The brain of the "newer" Homosapiens was larger and more complex than its predecessor; his face was shorter and he developed a chin, making it possible to speak a more complex language than before. Millions of years have passed since our ancestors roamed this earth and were able to draw conclusions from archeological and anthropological discoveries. But what other factors have affected our evolution and adaptation? Here are some surprising insights into the lives of early humans.
Fascinating and Strange Facts About Evolution and Early HumansPublished 7 months ago
Evidence from an ancient butchery site in Tanzania shows that early man was capable of ambushing herds of animals up to 1.6 million years earlier than previously thought. Ancient humans used complex hunting techniques to ambush and kill antelopes, gazelles, wildebeest, and other large animals at least two million years ago.
And, a hobbit-like species of humans lived approximately 18,000 years ago, according to Australian and Indonesian researchers. The species lived among pygmy elephants, 10-foot lizards, and were no taller than the average 3-year-old.
Homo sapiens, the ancestors of modern man, originated in Africa. The “Out of Africa” theory suggests that our ancestors left the continent and migrated to Europe and Asia. In doing so, they began replacing earlier examples of the human species - the Homo Erectus.
This migration took place approximately 80,000 years ago. What is interesting to note is that the Homo erectus (upright human) had actually followed the exact same route (from Africa to Eurasia) - over 1 million years ago. Looks like Homo sapiens weren't the first to get this idea.
During this time our ancestors were small-brained apemen that many assumed survived off what they could find.
And what they could find was thought to be food that the land produced or the meat that came from animals that had already died from natural causes or had been left behind by other larger predators. But the discovery of hunting and eating tools suggests our ancestors maybe have been more intellectually developed than originally thought.
While exact dates are always difficult to come by, studies have found out when our human-like ancestors began using the skin of animals to keep them warm. The need to do so may have arisen sometime after losing a large portion of body hair.
Scientists estimate the time at which humans began wearing “clothes” at around 1 million years ago. This time frame was decided by examining factors such as the genetic skin coloration of our ancestors at around this time.
Researchers have discovered that many human traits, including organs and behaviors, have lost most of their original function due to evolution. These include organs like the appendix, wisdom teeth, and the tailbone and also behavioral reflexes, such as the formation of goosebumps under the skin. The exact reason isn't known for sure, but there is an interesting hypothesis.
Scientists have suggested that a possible function was to raise the body's hair, making our ancestors appear larger to scare off predators. Raising the hair may also have been used to trap an extra layer of air, keeping an animal warm. We used to have thick hair, which stood on heads not so unlike the hair on the back of your neck now. Only, we lost that thick hair over time. But the physiologic response stayed.
There are some scientists that believe that communication traits and the use of language arose from a common dialect spoken by our ancestors when they were all still in Africa. This language may have been made up of sounds and grunts as opposed to formal words, but were certainly used as a means for instruction and expression.
With over 5000 different languages spoken in the world today, this concept is highly likely. Linguists and anthropologists suggest that human language probably started to develop around 100,000 years ago.
Many anthropologists now believe that early humans probably did not develop a culture until around that time. When we consider that the "mitochondrial Eve" theory suggests that we are all descended from one East African woman who lived about 150,000-200,000 years ago, It is shocking.
The theory suggests that Homo sapiens evolved over 150,000 years ago, around the time of mitochondrial Eve - the most recent common maternal ancestor of people currently on Earth. This means our species hung around for a really long time before we developed art, symbolic communication, ornaments, and bone tools. Pre-cultural humans did have sophisticated toolkits and fire, but anthropologists believe that they didn't invent language until a cultural explosion.
The creation and use of stone tools by our ancestors is estimated at about 2.6 million years ago.
In Dikika, Ethiopia, however, researchers have found fossil animal bones with possible butchery marks from up to 3.4 million years ago. This discovery could show that early humans used naturally sharp rocks on the bones of antelope-sized animals as a means of killing and cutting their food.
It appears as though travel and navigation were pretty commonplace for our ancestors, but this discovery was a pretty incredible feat.
There is no evidence that Homo sapiens travelled to Australia 50,000 years ago and they did so without maps, travel navigation - or any sea travel experience for that matter!
Considering our faces have evolved in order to receive a punch to the face - it makes sense that the part of our body used for delivering the punch would have had to evolve as well. The notion that evolution shaped our hands, not for dexterity, but to form fists, recently emerged from a study of anatomical changes in humans.
The study suggests that at about the same time we started walking upright, our hands became short and square with opposable thumbs. This change has always been recognized as a means for tool manipulation, but recent studies suggest the ability to form a fist was actually an evolutionary step to help to deliver a punch when fighting.
Long-skulled geniuses may have walked the earth before us.
In 1913, scientists uncovered strange-looking skull fragments that were later determined to sit behind childlike faces. This combination naturally led to conversations about aliens, but keep in mind: We survived, and they didn’t. So how smart could they be?
One of the most noticeable change in our own evolution and adaptation was the increase in the size of the human brain with the simultaneous decrease in the size of our teeth. This evolutionary trait came as a surprise to scientists who noticed the opposite trend in other animals whose brains and teeth grew in conjunction with each other.
One speculation regarding the decrease in tooth size might be that humans had started to cook food over a fire which made chewing and digestion easier, and subsequently saving time and energy - that our ancestors would have spent on digestion, therefore large teeth wouldn't have been needed for the acquisition of additional nutrient for brain growth.
As we know, there are a few things that set us apart from our animal counterparts - these include walking on two legs, creating and using stone tools, and being able to manage the natural element of fire.
Evidence of fire being used as a tool came from archaeologists’ discovery of Stone Age flint tools, which were used to both create fire and for scraping and cutting meat.
One of the primary factors of evolution is the food we consume. In the past, after traveling far distances and adapting to new locations, our ancestor’s diets changed according to what food was available to them. Their diet initially consisted of nuts, seeds, fish, insects, and small animals - providing the foundation that helped evolve our brains, and develop our intelligence. This resulted in early human’s creating advanced tools and using fire, which helped the evolution train keep on chugging.
A new study that was published in the scientific journal PNAS in 2018, claims that this diversity in the homo-sapiens diet is what allowed us to evolve over the neanderthals that consumed mainly meat. When the ice age made herds of animals fleet, the neanderthals starved while the homo-sapiens could nourish from other sources. The diet was perfected throughout the years and in the last few thousand of years, it is known as the Mediterranian diet. People who keep this diet to this day are known to live longer than others.
Human evolution is the extended process of change that suggests humans originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people stemmed from these ancestors and evolved over an extended period of time.
Our species, as suggested by many, will continue to evolve in response to our living conditions - different food, geographical and environmental changes, the advent of modern technology, and of course the amalgamation of our different races.
About 80,000 years ago there was a drastic reduction in the size of the human population. Archeologists are still not 100% sure what caused the decline, but it definitely wasn't pretty.
Some say there may have been a massive volcanic eruption that filled the sky with millions of particles of ash, blocking the sun’s heat for many years and in so doing creating freezing temperatures that would have severely affected life and population growth on earth at the time.
Neanderthals are our closest extinct human relatives. Our well-known, but often misunderstood ancestors lived in Europe and Asia as early as 200,000 years ago until about 30,000 years ago.
While the Neanderthals’ appearance was slightly similar to ours, they were shorter and stockier with angled cheekbones, prominent brow ridges, and wide noses. These qualities were important for survival in Europe’s cold climate and in order to hunt big animals for food. Though sometimes thought of as barbarians, scientists have discovered that Neanderthals in fact used tools, buried their dead and had control over fire.
Despite having found a large variety of different human species, the discoveries don’t differ too much in terms of their genetic make up. The scientific reasoning lies in the fact that we (and all of our ancestors) come from the same location in East Africa, where it is assumed all of our human-ape ancestors lived.
Population geneticists describe genetic diversity with a measure called "effective population size." Basically, effective population size is how many people you would need to reproduce the genetic diversity of our full population. For humans, this number is really low and hovers at around 15,000 individuals. It is kind of crazy when you consider that the actual population size is 7 billion. If compared to mice, some species of them have an effective population size of 733,000.
In today's diet and our health-obsessed world, we are often told to eat many small meals a day in order to increase our metabolism in order to lose weight. The scientific truth is that a slow metabolism very well is the key to our living longer than other animals.
The faster your metabolism, the more energy you need. The more energy you use the faster your body will wear out. If we were to compare humans rate of metabolism with that of other mammals, we would find that our metabolic rate is substantially lower, sometimes up to 50%.
DUF 1220 is a protein that may be essential in the development and evolution of the human brain evolution. This notion comes from the understanding that human beings have in excess 270 copies of DUF1220 in their brains, whereas our primate cousins, like chimpanzees and gorillas have slightly less copies of the protein in their brains.
With further research we have no doubt scientists will link human intelligence to the protein itself, accounting for the disparity between us and animals. However, some of us still have some muscles our ancestors used to use, while some nine percent of people are missing the muscle in their foot that allows them to grip objects like our primitive ancestors. (Might as well bend down, anyway, right?)
It took 100,000 years for the population to reach one billion people. It took only 133 years for it to reach its second billion, and 44 after that to double again. Ecologists predict the world population will hit eight billion people by 2025.
A mysterious illness (probably tuberculosis) is thought to have wiped out all but 2,000 of our early ancestors around 70,000 BC — putting us shoulder-to-shoulder with black rhinos and giant pandas on the endangered species list - so who really knows what lies ahead for us?