Plant Adaptation

When George H. W. Bush was president of the United States, he was involved in a interesting and humorous “dust-up” with nutritionists and parents alike. The humor of the incident may have carried over from discussion of the informal utterances of our nation’s chief executive all the way to resolution of “See, I told you so!” family squabbles around the dinner table. Famously, President Bush declared a strong dislike for broccoli, a vegetable which has become a staple of admiration from nutritionists and many food enthusiasts who love its qualities 2500 years after it first appeared on our planet.

Before using broccoli as an example to highlight the wonders of plant domestication and adaptation, I cannot resist recounting a humorous story from my childhood. My father was well versed in the science of agriculture as agent of a farm seed company in the 1940s. His expertise extended to our family garden planted each spring on our one acre lot. One year the broccoli was particularly productive, but family finances were not. My parents opted to freeze large quantities of broccoli even after the central New York State autumn had provided several frosts and the broccoli had begun its flowering stage. Over the winter my older brother, offered a frozen vegetable he did not like from the get-go, ended up despising it even more. His younger brother, writer of this blog, has overcome his childhood memory and now appreciates this domesticated vegetable delight. 

“Broccoli is a human innovation, a man-made food…..selected and cultivated by man throughout history. Known for its green hue and resemblance to a tiny tree, broccoli has been the bane of kids’ existence…..Broccoli is the result of selective breeding of wild cabbage plants starting around the 6th century BC.” (ponderweasel website) 

Brassica oleracea is a species of plants represented by a number of well-known vegetables. Some of the most well known are broccoli, cauliflower, brussels sprouts, kohlrabi, and kale, but many others exist, mostly consumed as food; a few others are valued as ornamentals. Not well known is the fact that all of the many cultivars of Brassica oleracea originated by the process of selection of plant traits more suited to the human rather than the wild environment. Surprisingly, all representatives of Brassica oleracea such as the popular vegetables mentioned above belong to the same species. After the initial selection processes repeated through many generations, horticulturalists focused on improving the plants they had selected. Cultivars result from selection skills. Beyond selection, improvement in the plants is accomplished by development of cultigens additionally altered in some way by clever and creative man made genetic initiatives.

God initially created many different species of plants and animals. Since the agricultural revolution many alterations at the species level have been accomplished by taking advantage of the potential of the artificial (man-made) selection process. The Creator intelligently designed life with its incredible DNA molecule and its genetic blueprint for the physical structure and functionality of living things, and the intricate regulatory processes inherent in life from the simplest living things to the complex human creature made in the image of God, and the millions of species between these extremes of life.

It is apparent that the potential for domestication of plants and animals is not tantamount to developing a new species. This disturbs evolutionists who search for examples to count naturalistic evolution as wholesale production of novel species. Broccoli, cauliflower, brussels sprouts, kohlrabi, and kale remain the same species—Brassica oleracea. Existence of these vegetables, and many other domesticated plants of diverse species, depends on man’s discovery of the process of selection, a rather unremarkable idea that early agriculturalists utilized: “Let’s select the largest, healthiest, most attractive, most harvestable, tastiest vegetables for next year’s crop and repeat the process year by year,” they reasoned. Little did they know their crops responded to the selection process by accomplishing modest genetic modifications. The action of just one gene at a specific position on the chromosome (a genetic locus), or several genes at several positions on the chromosome (genetic loci) could alter the phenotype (physical trait or traits) of certain plants. The gradual alteration of genes producing broccoli from the historic wild cabbage plant is a simple cause and effect phenomenon. The process, however, interspersed between the cause and effect steps, is not well understood except in the mind of our Creator.

Potential for modifications in plants and animals to benefit humanity is an outstanding example of intelligent design gifted by God to man to accomplish wondrous things in the area of genetics. We make the distinction between modifying living things and creating completely new living things. Does man have the ability to create life? even simple life? Currently some scientists, even theologians, recognize this possibility given the remarkable advances in knowledge of genetics and technology. Is this question fraught with unpleasant ethical overtones? Perhaps it is. 

If even the simplest life were ever produced and could be biologically defined as life, it would be an outstanding example of application of principles of intelligent design, already applied by God to produce a universe of incredible divine design characteristics and millions of unique and beautiful species.          

  

       

The Domestication Syndrome

Humanity’s transition to agriculture in the last 10,000 years could not have occurred without the domestication phenomenon. Domestication of animals and plants was associated with the transformative revolution in agriculture which led to significant human population gains. Background for this discussion is our recent post of 11/26/16:

http://jasscience.blogspot.com/2016/11/genetics-king-of-domestication.html

Fundamental changes in animal and plant life were accomplished by a process of deliberate human selection over time. Therefore, scientists know both the cause and effect of domestication, but this leaves many important questions unanswered. It has been reported that 148 animal species were candidates for domestication but only 14 have actually been successfully domesticated. Some animals, for example, zebras, tigers, and rhinoceros do not make good candidates for domestication, but modern cattle, chickens, and horses and a few other species are the result of an ancient domestication process.

Indians of the New World domesticated over 300 food plants hundreds or thousands of years before explorers from the Old World discovered New World lands. Old World residents soon learned New World secrets of plant domestication. Today four billion people consume primarily a plant-based diet while two billion rely mostly on meat-based nutrition. Statistics tell us the extent and importance of domestication: Human biomass (mass of all humans on earth) is roughly half the biomass of domesticated livestock. The biomass of wild mammals is now less than 10% of domesticated livestock. Twelve species of domesticated plants provide an 80% share of Earth’s crops. The phenomenon of domestication fueling the world’s agricultural revolution is vitally important as we consider the welfare of the world’s teeming billions.

Many modern studies have affirmed the genetic basis of domestication. Looking at the chromosomes of living organisms in our cells’ nuclei, we see that genes are superimposed upon the chromosome structure, and that alleles are superimposed on genes. Different alleles from two parents provide diversity of traits. As humans observed the products of reproduction, they selected the traits they found most desirable for future generations. The original domesticators of prehistory were completely unaware of the biological wonders taking place at the level of unseen atoms and molecules in the living animals and plants surrounding them. The causes and effects were apparent to the domesticators, but even in our day geneticists still do not know how molecular entities at the level of cells actually produce their novel finished product—new tissues, new morphology, and new behaviors.

We illustrate with a mundane example from a diverse field. The sequence of events resulting in the construction and occupancy of a new residential dwelling may be described reasonably well by the layman who knows little about home construction. The prospective new owner must conceptualize, plan, communicate with a builder, design, and finance his new project, to outline a few steps in the event sequence. A skilled contractor must purchase material, assemble the concrete, wood, and steel and follow the building blueprint in an organized manner at the appropriate location. Then, and only then, is the structure ready for production. The new owners are free to observe and understand what is happening at the level of production. Our family observed the production process for building three different new homes in the past 45 years. Not having been a skilled master of building construction, I was able, however, to observe the production process and describe the building and installation process reasonably well after visits to the active construction site. Skilled workers used bodily and electrical energy applied to drills, hammers, saws, and a variety of other tools to assemble our home.

Returning to the cause and effect chain of domestication by which our planet’s animals and plants have been altered to promote human population growth ever since the agricultural revolution, we introduce the term domestication syndrome (DS) to the discussion. Domestication syndrome is a “group of traits” observed to occur together in domesticated animals and plants. At the risk of oversimplification, we mention a few examples of the “group of traits.” In animals, domestication results in tameness, docility, coat color changes, smaller jaws, floppy ears, tooth size reduction, cranio-facial morphology, and changes in body chemistry. In plants, domesticates produce seeds on plants easier to harvest, cultivate and sow. These plants provide uniform seed germination and ripening. In terms of other physical traits, domesticated plants have improved taste, fruit size, color, and shape.

We provide several examples to prove the point concerning the domestication syndrome. Modern dog breeds provide the best example. All dog breeds are technically the same species and can interbreed. The uniqueness of dozens of individual canine breeds is an extreme example of selection resulting in the domestication syndrome described above, a suite of characteristics common in some degree to all domesticated animals. Dog breeders exercise wisdom concerning the prevalence of low genetic diversity in dog breeds. Phenotypic traits of dogs are governed by a very small number of genes. Sometimes unfortunate defects result from over-manipulating the limited genome of dogs. In contrast, human genetic traits are exceedingly diverse and result in hundreds of characteristics that create wonderful diversity in humanity.

With respect to plant life, we illustrate by envisioning a beautiful, ready to harvest field of corn from the US Midwest during October. At the beginning of the human agricultural revolution no plant crop resembled modern domesticated corn even remotely. The Creator intelligently designed living things to provide the potential for modern harvests in both the animal and plant world. Modern agriculturalists must recognize the perils of domestication along with its benefits. This topic is the subject of much study by biologists.

Finally, we return to the causes and effects of the molecular processes inherent in the production of a domesticated animal or plant. Causes? Scientists have determined that the selection process is the cause of domestication. Effects? Likewise, scientists have discovered the effect of selection: the domestication syndrome described above. Our questions relate to just how thousands of molecules scurry about to assemble new proteins and produce new organs in the bodies of the domesticated animals or plants, or to accomplish changes in their behavior. How are these changes accomplished?

Many hypothesized evolutionary processes, including the processes of domestication, are explained with naturalistic statements that, “Causes explain processes.” I propose that citing causes does not explain the processes involved in domestication. Our Creator designed intelligent strategies for accomplishing domestication of animals and plants. The processes by which domestication is accomplished are spectacular, but not always explainable merely by citing a cause.                                

          

Paleoanthropology

In post-retirement reverie I have imagined what my profession might be if given a second chance at a career decision. I have never regretted becoming a public school science teacher. Nevertheless, in retirement my opportunity to research diverse topics of science has yielded many opportunities to expand personal knowledge beyond the curricular requirements.

The subject of human origins has occupied my personal attention extensively. In the classroom my assignments related to physical science and earth science. Topics of human origins and organic evolution were not ordinarily part of my teaching responsibility. Retirement provided opportunity to study and discuss diverse views on human origins. Generally we are describing the discipline of paleoanthropology. Within each origins belief system, there are subtle and not so subtle differences. We have discussed major positions on human origins in our science/faith blog since 2007.

Human origins beliefs center on four major positions. (1) Young Earth Creationism: All things were divinely created six to ten thousand years ago including the physical universe with all its living things (2) Old Earth Creationism: The physical universe originated and life was created by God in divine supernatural acts since the beginning 13.7 billion years ago (3) Organic evolution: Since the beginning of the physical universe all life traces its origin to a common ancestor developing from previously existing life forms over time by naturalistic events (4) Theistic Evolution: At the beginning God endowed physical matter with the ability to transform itself into novel life. (In describing the four positions we have excluded variations of these belief systems and avoided discussions of origins processes.)

Adherents of positions (1) and (2) believe in the existence and action of an omnipotent Creator. Adherents of position (3) do not believe God is involved in the process of evolution and may not believe in God as a supernatural entity. (4) Adherents of position (4) are theists with varying degrees of belief in how God acts or does not act. (All positions except Young Earth Creationism accept a universe age of 13.7 billion years beginning with the Big Bang.)

During the course of our review of human existence we have realized that some readers may have been surprised by our assertions that anatomically and intellectually modern humans have inhabited our planet for upwards of 100,000 years or more. It also may be surprising that the creation of modern humanity, the flood of Noah, and the Tower of Babel account occurred in the distant past. Nonetheless we characterize these events as relatively recent, just a moment ago compared with the enormous time frames of the geological time scale. Evidence for time scales we cite is unassailable based on reliable scientific evidence. 

It is surprising that certain advances of modern human societies occurred so late on the historical time scale. That humans were hunter-gatherers until 10,000 to 12,000 years ago may be unexpected or that thousands of fully human hunter-gatherers still exist in primitive, isolated locations in modern times. We may find it incredible that farming and domestication had not taken hold as a concomitant of human experience until relatively recently. Even after humanity’s embrace of agriculture, however, we wonder why intelligent humans did not develop writing skills to benefit their daily activities, to preserve more accurate and detailed records of their society, or to preserve their historical legacy for hundreds of generations to follow. Our kindergarteners and first graders learn writing and reading skills very early in their lives. Why was wheel technology not conceptualized in the intellectual and practical experience of modern humans before 3500 BC?

We have written about the startling massive, complex human-built structure of Gobeckli Tepe in ancient Turkey. Its challenging construction was begun in 11,600 BC, thousands of years before wheels and writing skills were imagined by their society of hunter-gatherers. It is obvious that a fully human population existed at the time and had existed for tens of thousands of years with impressive survival skills. Why, we may ask, were certain agricultural, technological, and linguistic skills painfully slow and sporadic in developing?

Let us leap forward in time several millennia to the beginning of the Scientific Revolution. Until then almost all the best minds of the civilized world could not determine the difference between real and apparent motion in the heavens. The result was the errant belief that Earth was located at the center of the universe with all heavenly bodies circling around us. This basic truth of physical reality was a difficult standard to achieve until the 16th century, thanks to Copernicus. On a different level of knowledge, why did basic hygiene practices, germ theory, and effective treatment of disease escape humanity for most of its tenure on the planet? The US Civil War claimed about 650,000 lives, a majority of them from disease and horrible practices of hygiene.

Our recent discussions relating to pre-historic humanity raise questions about the fully human characteristics of early man in the past 50,000 or 100,000 years. Secular paleoanthropologists acknowledge humans as distinct from some less than human members of the hominid family. Neanderthals and the recently discovered Denisovans are hominids falling short of full human characteristics. These creatures co-existed for a time with modern humans but went extinct several tens of thousands of years ago. They come up short on the scale of full anatomical and intellectual humanity created in the image of God but they are also products of God’s creation.

Returning to the subject of personal reverie expressed in our opening paragraphs, we have discovered that the issue of creation and the history of human origins deals with many unanswered questions and unresolved problems. There are no written records extending beyond five or six thousand years. The written genealogies in the book of Genesis are incomplete compared with modern genealogies. The exceedingly brief accounts of creation events and early humanity, reliable and trustworthy as far as they go, are supplemented by past, present, and future discoveries provided by scientists and archaeologists. Paleoanthropology holds fascination for its potential for truth discovery in human origins.

We wonder why anatomically and intellectually advanced humans did not achieve feats or make discoveries long ago that we now accept as a matter of course. Why did agriculture arrive so late? Could not a committee of the most intelligent ancient residents have figured out human writing skills or the simple technology of the wheel? Why could smart people not have figured out germ theory or healthy hygiene hundreds or thousands of years ago and saved many lives? The Green Revolution of the  1960s arguably saved a billion lives. Why was its arrival on the human scene delayed?

One may pose similar questions to the Apostle Paul, writer of the Book of Galatians. His expressions “But when the time had fully come” or “When the fullness of time had come” (Gal. 4:4) refer to the mystery of the timing of the arrival of Christ, Redeemer of man. Ultimately, the timing of that marvelous event was in the hands of the Father. Modern theological scholars search for answers. Likewise, paleoanthropologists search for answers concerning timing of landmark discoveries and inventions to benefit humanity’s physical existence. Perhaps theologians could offer additional insights. We look for many sources of knowledge to investigate unknowns and discover answers to our questions.           

          

    

   

Genetics--King of Domestication

Our recent blog posts have highlighted the human agricultural revolution which occurred about 10-12,000 years ago. The transitions were not uniform in all areas. Some changes had begun earlier in an era when human population growth was limited. The full scope of the agricultural revolution, however, delivered a positive jolt to human population growth. Human societies changed.

Many changes have been spectacular. A problem in modern biology consists of understanding the changes that shape the diversity of our natural world. The modifications of plants and animals during the course of the agricultural revolution were not major alterations of DNA structure. The phenomenon of animal and plant domestication does not produce a new species, but involves significant changes in genetics. One oft-repeated term is, “It’s in my genes.” A gene is a small “stretch” of DNA. Genes comprise only 1% of the three billion nucleotide letters of the huge DNA molecule, but small differences in genes can make a large difference in what biologists term an organism’s phenotype, the physical expression of an animal or plant.

Genes are components of chromosomes. Animals and plants have two sets of chromosomes—one from each parent. They are known as diploid. When both chromosomes contain identical genes at a given location, they are termed homozygous. If they contain different genes for a given trait at the given location, they are termed heterozygous. Variant forms of two different genes are termed alleles which sometimes result in diverse physical manifestations in their offspring. Early human agriculturists noticed these different traits and selected individuals with the most desired variations to reproduce. Over long periods of time the new traits became more and more manifest as the process of selection proceeded. The population changed somewhat but did not become a new species. Chromosomes have many genes which act to produce many proteins—physical building blocks of an animal or plant.

 As we look back on animal and plant domestication coming into play fairly suddenly about 10,000 BC, some questions occur. During the existence of full humanity extending back several tens of thousands of years, nothing like the agricultural revolution had occurred in human history. Until then the modern fully human population had been limited by Earth’s ice age climate. The Garden of Eden could have been located in the Persian Gulf area  during the Ice Age when sea level was considerably lower. Earth’s temperatures close to the equator were mild, unlike the Ice Age climate in the northern US Midwest and northern Europe. Theologians who see Adam and Eve as a literal, initial couple according the scriptural account of man’s origin, and secular paleontologists who have postulated a sort of population bottleneck somewhere in the area of the Middle East share some measure of agreement based on the evidence of human paleontology.

Plant and animal domestication since 10,000 BC has changed the landscape of hundreds of living organisms with which man has interacted. In some cases the domesticated plant or animal is considerably different from the pre-domesticated organism even though the domesticant is still the same species because they were able to interbreed with the original species. Were humans to travel back 12,000 years in time, he would perceive that many organisms alive in that day were very different. Human agriculturists have succeeded in substantially altering the organisms’ phenotypes.

Humans at the beginning of the agricultural revolution did not understand the workings of genetics. However they did discover that application of artificial selection of certain specimens with desirable traits resulted in different improved traits in their offspring when repeatedly selected over many generations. In prehistoric times it made sense to select the fittest specimens to reproduce. Most often animals were selected for their more docile behaviors and more favorable interactions with humans. Later agriculturalists also selected plants and animals for more abundant, attractive, convenient, useful, or tasty products they supplied.

The about.com website writer K. Kris Hirst has produced thoughtful and informative articles concerning the domestication phenomena of plants and animals. From her site  “Animal Domestication—Table of Dates and Places” we quote: “Animal domestication…is a millennia-long process that creates the mutually beneficial relationship that exists today between animals and humans…All of the animals that we share our lives with today, such as dogs, cats, cattle, sheep, camels, geese, horses, and pigs, started out as wild animals but we changed them over the hundreds and thousands of years into more sweet-natured and tractable partners in farming.” One of Hirst’s most colorful quotes describes, “…changing the lean, nasty wild boar into a fat, friendly farm animal.” Many changes resulting from domestication in the world of plants have been even more phenotypically spectacular.

Is domestication an example of organic evolution? Notwithstanding the ambiguous analysis of evolutionists, we propose it is not. The accepted modern textbook meaning of organic evolution has very specific implications. It is a naturalistic theory which does not include a hint of original or ongoing divine miracle. Some theistic evolutionists claim God oversees the process of natural selection acting in concert with mutation to produce a new species and ultimately many millions of new species. Naturalistic evolutionists do not see God overseeing or standing by to observe the developmental process—God is not part of the equation at all. In their view, every living thing descended from a common ancestor. In effect, the expressions molecules to man, particles to people, or life from non-life, some of which are meant to be humorous, describe the essence of the belief system of naturalistic evolution.

In contrast, humans’ artificial selection process resulting in domestication of animals and plants is an intelligently designed feature of Earth’s living things. If God has created all things, we may see the outcome of generations of human artificial selection as a gift of the Creator enabling humanity to “subdue the earth” as commanded in Genesis 1:28. Our blog recognizes healthy “evolution” defined simply as change. The Creator enables man to accomplish healthy change in animals and plants to enhance the quality of his existence. 

  

     

  

Physical/Spiritual Dualities

Our world is a world of multiple dualities. Let us give a few examples. There are many physical dualities such as day and night, light and dark, hot and cold. In the world of morality, good and evil exist. There are many dualistic manifestations of good and evil, such as kindness vs cruelty. In the more esoteric philosophical concept of ontology, defined according to dictionary sources as the nature of human existence, being, becoming, or reality, there are many examples of duality such as the distinction between body and mind. In theology we speak of the duality of our physical and spiritual existence. Our own science/faith blog might be described as a discussion of dualities. Some scientists might have difficulty relating science and faith. They may feel that knowledge of science does not form a duality with faith. Our position is that science and faith comprise a healthy duality.

The relationship of the physical and spiritual may be considered a duality. Our past blog posts mostly describe the physical dimensions with which science deals. We have attempted to blend a spiritual and scriptural dimension to the physical science issues we have raised. 

Churches in our time address the spiritual needs of their members and society. This is appropriate, for what is more important than settling eternal questions about our souls and where we spend eternity? Our pulpit ministries also remind us that God has provided for the diverse physical needs of our lives. We call this a spiritual/physical duality—one of hundreds of dualities which comprise our human existence. In the scheme of human experience both elements merge. Man’s physical existence is the framework for his spiritual existence. The blending of physical and spiritual dimensions of humanity is a concept authored by the Creator of all things.           

In the United States we live in a time of plenteous physical blessings. In our day the standard of living has advanced far beyond the acquisition of bountiful physical food, shoes, and clothing. The KJV (I Tim 6:8) echoes through my youthful memory when acquisition of “food and raiment” was of much greater concern than today. Perhaps spiritual concerns acquired more importance in those days. In our modern world, not only do we have a surfeit of supermarket food variety, but we search  for additional pleasure from an ever-expanding array of physical goods from hand-held technological wi-fi marvels to automobiles which easily run for 100,000+ miles and may soon drive themselves. Perhaps “food and raiment” has acquired an expanded modern meaning.

In this day of plenty our children and grandchildren experience difficulty identifying with their parents’ and grandparents’ recollections of what supplied physical and spiritual satisfaction as recently as the early 20th century, not to mention what life was like in distant pioneer days of our nation. For those willing to search more deeply into humanity’s history on this planet, we take a giant time leap in order to recapture the overwhelming concerns of people in much earlier epochs. If we want to stretch our awareness we could study historians’ account going back to 3000-4000 BC before the invention of writing. Predating the so-called “Rise of Civilization,” modern archaeologists attempt to recapture the duality of the physical and spiritual in the lives of even more ancient humans. No written works give us clues. Archaeological artifacts and art work tell the story of human life.

Let us travel in our time machine back to 10,000 BC. The people were mostly hunter-gatherers as we have noted in a number of recent posts. Widespread agriculture did not become a feature of human experience until roughly 8000 BC. This date marked the approximate end of the Paleolithic Period (Old Stone Age) and the beginning of the Neolithic Period (New Stone Age).

A recent conversation with two friends raised the subject of the Ice Age. I stated that the Wisconsin glacial event ended geologically rather abruptly around 10,000 BC but that hunter-gatherer humans from that era were fully human. The human population may have been 2 to 3 million, but estimates range from 1 to 15 million. One friend opined that these residents were “cave men.” They were not, I stated, reiterating their “fully human” status. It is difficult to imagine fully human beings created in the “Image of God” not yet having discovered the benefits of agriculture, the wheel, or writing. When the onset of ancient agriculture produced a more urban, sedentary society beginning about 8,000 BC, humanity enjoyed a population explosion of sorts—tripling by the time of the invention of the wheel and the development of writing in 3000 to 3500 BC. By the time of Christ world population had expanded to 200 million.

About 9600 BC the hunter-gatherer society in Turkey built an enormous series of structures on 22 acres which is not yet 5% excavated. It is obvious from the complex already excavated that a large concentration of well-organized labor built the structures over a long period of time. It was abandoned around 8200 BC. The site is located at Gobekli Tepe. It was never occupied as a human residence. Some speculate that the structure was a religious temple. Did these hunter-gatherers have a sense of the sacred? There is intense discussion about these people who lived just after the end of the Wisconsin glacial event. The northern ice sheet did not reach them in their location in present day Turkey. With regard to food, the workers ate the plentiful wild animals and plants from the area. The agricultural revolution had not yet begun. Evidence left indicates they were aware of the duality of the physical and the spiritual. They were probably animistic, able to conceptualize spirits and the supernatural. 

The full humanity of the Gobekli Tepe hunter-gatherer population cannot be questioned. Neither should we question the humanity of homo sapiens sapiens existing on our planet for tens of thousands of years or the dozens of low population, uncontacted hunter-gather societies still currently living in remote wild areas of Earth. Hunter-gatherer people, whether modern or ancient, manifest an awareness of a realm beyond the physical. Physical-spiritual dualism has been a part of man’s conceptual awareness since his creation in the “Image of God.”

When Adam and Eve were created, God directly interacted with them, giving them divine directions for living on a high spiritual plane. They failed to follow God’s directions. We imagine that their period of innocence was brief. In a few chapters, Genesis tells of their children and other descendants, the story of Noah and the flood, and the Tower of Babel. It is likely that the events surrounding Adam and Eve took place several tens of millennia before Noah’s flood. The tower of Babel account was the most recent. It is probable that Paleo-Indians arrived in the New World between 16500 and 13000 years ago when the sea level was very low and the “earth was divided” (Genesis 10:25). The Tower of Babel incident likely took place before 11000 years ago and Noah’s flood even before that. Low sea levels facilitated the spread of humanity around the earth to Indonesia, Australia, and North and South America.

In humanity’s failure to remain innocent, he never lost his awareness of the duality of his physical existence and the reality of the spiritual. Tragically, man’s concept of the spiritual is most often an intellectual construct of his own making. Romans 1:21 proclaims the bitter truth: “For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened” (Romans 1:21 NIV).  

       

     

Autumn's Temporary Decline

Many readers count winter, spring, or summer as their favorite season. Others consider autumn  their favorite. Their reasons are abundant and diverse. Many factors contribute to one’s assignment of favorite status to one quarter of the annual calendar. Our ability to rationalize is strengthened and refined. We are able to trace interrelated factors of development and decline and their importance in an overall scheme.

Our 10/28/08 post was entitled Autumn and Early Rains:

http://jasscience.blogspot.com/2008/10/autumn-and-early-rains.html

In Israel the rains described in Deuteronomy and other passages are literally autumn rains coming at the conclusion of the current year’s harvest, and latter rains coming during the springtime when the newly planted crop is on its way to production. In one dimension of autumn we could describe the coming agricultural and astronomical renewal in store for the earth following a “period of maturity bordering on decline.” Harvest provides a time of rejoicing and thankfulness but the joyful times do not conclude even though lush, verdant fields physically “fail” in autumn. Anticipation of renewal in a new crop the following spring, summer, and autumn rekindles new hope. The beauty of a continually recycling earth is part of the Creator’s genius.

Agriculturally, temperate climates produce a majority of the world’s food. These  climates are dominated by the characteristics of seasonal cycles between tropical and polar regions—neither extremely hot nor extremely cold. Apart from the wonder of food production characteristic of temperate regions, our Creator has also provided esthetic enjoyment related to the change of seasons in these areas. Autumn leaves are especially colorful in southern Canada, northeastern US and a few other world locations. The fascination of behavioral changes in wildlife, from birds and mammals to insects and other species relate to seasonal changes. Temperate climates appeal to many residents because they enjoy meteorological variety throughout the year.

Seasonal changes have a cause and effect relationship with Earth’s 23.5º axis tilt. If the axis were exactly perpendicular to the plane of the planet’s orbit there would be no seasons at all. Earth’s life would be very different. There would be no traditional cropping patterns. Human population would be bunched around the equator. Animal migration would be non-existent. Life as we know it would be altered in multiple deleterious ways from present conditions on our axis-tilted Sun satellite.

The most significant cause and effect relationship of regular and predictable seasonal cycling phenomena is the slowly changing elevation of the mid-day sun above the horizon. In tropical regions the changing angle of the mid-day sun is less significant to the amount of heat tropical populations receive. People living at the equator (0º latitude) would observe the noon sun fluctuating about 67º or more above the horizon all year long. The Sun’s rays would always strike Earth more directly to provide more heat. Weather in the tropic zones is warm all year long. Significant seasonal changes do not occur.  

In contrast, people living at 41º N latitude where your blogger lived and taught science, would see the noon sun at 72º above the horizon at the beginning of summer. (The sun always appears directly south at noon in the northern hemisphere.) At the beginning of autumn the noon sun has gradually declined to about 48º above the horizon. When autumn ends the sun is only about 25º above the horizon. We may understand why autumn is considered a period of decline: The sun’s elevation above the horizon is reduced, solar rays increasingly must be shared over a larger area of land surface, average daily temperature decreases, and length of daylight shortens. We observe that colorful plant greenery fades as crops mature. 

Earth residents, take heart—renewal awaits. On a planet whose axis is tilted to produce seasons, our revolving earth produces seasonal recycling as it has for thousands of millennia. At the beginning of winter, the sun’s elevation slowly increases after a few weeks. The temperature in northern locations begins a gradual rise as daylight starts to lengthen. After a few weeks the earth starts to gain more heat than it loses. By late February and early March residents notice the gradual rise in temperatures which continues into the new growing season. Earth’s wonderful seasonal cycle is renewed!

The repeating cycle of seasons joins with the day/night cycle and numerous other physical and chemical cycles to provide a world described by the Creator as “very good” (Genesis 1:31). Is winter too cold? Is summer too hot? Is snow or rain too heavy at times? Do severe droughts and windstorms sometimes cause discomfort or worse? Is climate change a reality? We reply, “Yes, and it has always been so.” Embedded in these observations are wonderful discoveries for environmental scientists who study the intricacies of life supporting conditions on our planet. Earth’s population has increased over sevenfold since the turn of the 19th century. Planet Earth is a place to thrive.

From January to April 2012 our blog topics focused mainly on some of the important cycles operating on our dynamic planet. Any one of earth’s many cycles is worthy of detailed study by specialists. To the non-scientist, we suggest pursuit of at least a casual overview of nature’s cycles. We recommend perusing our series of posts beginning in January and concluding in April 2012:

http://jasscience.blogspot.com/2012/01/ubiquity-of-cycles.html

http://jasscience.blogspot.com/2012/04/properly-basic-cycles.html

      

     

History and Prehistory

In 10,000 BC many changes occurred in the condition of our planet and the humanity calling Earth their home. The Ice Age had locked up millions of cubic miles of earth’s water in ice and had provided a rather harsh planetary environment for Earth residents. Agriculturalists could not thrive in the cold temperatures. Fully human hunter/gatherers, however, formed surprising cultures. Hunter/gatherers existed for tens of thousands of years prior to the onset of human agriculture. Ironically, the hunter/gatherer diet may have been somewhat more healthful than the grain-based agricultural diet which developed about 10,000 BC. The hunter/gatherer culture, however, could not produce the human population increase enabled by the development of agriculture during the so-called Rise of Civilization.

Our posts have described the agricultural revolution and its correspondence to the so-called Rise of Civilization in the 12,000 years following the close of the Wisconsin glacial events. Fascinating preludes to the revolution predate the usual “Rise of Civilization” enthusiasm generated by our teachers of human history. With respect to this complex topic, we state civilization as it is commonly perceived, arose about 3,000 to 4,000 BC. The Mesopotamian civilization continued a definite trend toward agriculture which had begun several thousand years earlier after the demise of the Ice Age. Before the recognized termination of the Ice Age, some humans, early Kebarans and Natufians, were protoagrarians experimenting with primitive agriculture.

Human history became easier to report after the invention of writing. Our modern culture is fueled by our ability to write and read. Writing did not develop until late in the history of the human race, approximately 5,000-6,000 years ago. This fact is astonishing. Perhaps our introductory high school and college history courses entitled, for example, “Development of Western Civilization” would have a very different scope had humans implemented writing and developed supporting technologies many millennia before.       

A deeper question relates to the abilities and experiences of humanity before the Rise of Civilization in the several millennia before Christ. What about the hunter/gatherer cultures which persisted before and during the early transition to agriculture? Do we look upon those early men with scorn because they had primitive lifestyles? Do we ignore or minimize the human experience of ten, twenty, or fifty thousand years ago? It is certain that human pre-history holds fascination if we could only access it more effectively. We must rely on discoveries and inferences of professional archaeologists to instruct us concerning the events of pre-history. We are grateful for their scientific skill sets.

We illustrate the value of archaeology in revealing the discovery of an early Neolithic site. Klaus Schmidt (1953-2014), a German pre-historian and archaeologist, worked at the site from 1996 until his death. It is located in modern Turkey and dates from 10,000 BC. It is called Gobeckli Tepe. Schmidt stated the site is less than 5% excavated. Gobeckli Tepe was an early Neolithic sanctuary. We quote from Wikipedia’s article on Gobeckli Tepe, an article we enthusiastically recommend to our readers:

“Up to now no traces of domesticated plants or animals have been found. The inhabitants are assumed to have been hunters and gatherers…..It is believed that the elevated location may have functioned as a spiritual center by 11,000 BCE or even earlier…..The surviving structures, then, not only predate pottery, metallurgy, and the invention of writing or the wheel, they were built before the so-called Neolithic Revolution, i. e., the beginning of agriculture and animal husbandry around 9,000 BCE…..Archaeologists estimate that up to 500 persons were required to extract the heavy pillars from local quarries and move them 100-500 meters to the site. The pillars weigh 10-20 metric tons…..”

“Schmidt considered Gobeckli Tepe a central location for a cult of the dead and that the carved animals are there to protect the dead…..Gobeckli Tepe is regarded as an archaeological discovery of the greatest importance…..It shows that the erection of monumental complexes was within the capacities of hunter-gatherers…..”

Old Testament scripture deals mainly with the written history of Israel and the Chosen People and the New Testament relates the revelation of God in Christ. The Bible is not a detailed record of human history and natural science since the creation of man in God’s image. The Father has enabled us to discover plentiful historical information concerning human and natural events. After we accept the brief scriptural account of God’s acts of creation, we are content to supplement our knowledge of human and natural history by studying findings of skilled scientists, including archaeologists.