Why did humans evolve from other primates?

Let me make certain that my understanding is correct. Evolution says that humans and apes share a common ancestor. Therefore, there was an organism in the distant past, and apes and humans bifurcated from that ancestor. Is this correct?

Obviously, some organisms adapt. Look at peppered moths. They adapted with the advent of the Industrial revolution. Predation became a problem, and natural selection solved it.

But why precisely did humans evolve? Darwin's finches adapted to their environments, as did the moths. So why was it necessary for humans to evolve in order to fit into our environment? Explain.

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  • 8 years ago
    Favorite Answer

    Great point about adaptation vs evolution. We did not evolve, though. God created us and all there is.

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  • 8 years ago

    One thing to note is that the adaptation towards bipedal walking occurred before the leap in brain size. As Michael stated, long distance walking may have been a factor, humans are actually better at walking long distances than other primates.But Australopithecus and homo habalis were only slightly larger in cranial size than other primates.

    I think increased tool use may have been a factor, we see Chimpanzees using tools in a primitive way, like taking a stick and putting it into an ant hill and then eating the ants that climb the stick. Some Gorillas will occasionally grab a tree branch and swing it to intimidate others, I could see increasing instances of tool use favoring a bipedal stance as well.

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  • Lv 4
    8 years ago

    There is no why because there's no higher hand guiding evolution. When you use the word "why" it seems like you're looking for some higher purpose or meaning when there is none.

    What separates humans from other species on earth? Their level of intelligence. Humans are frail. They constantly have to eat. Other species are faster, stronger, and better suited to fit harsh environments in general. Only by intelligence were humans able to keep progressing and stand above all other species. And there isn't a why behind it.

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  • 8 years ago

    Our earliest ancestors lived in the trees. At one point many thousands of years ago, the climate shifted and many of the great forests gave way to broad savannas. The forests were overpopulated, some of the arboreal primates had to descend and learn to live in the open. To live in an environment of roving predators without trees to hide in, they HAD to develop bigger brains and a very cohesive hunter-gatherer society. They also had to learn to walk upright to see farther and to travel more efficiently. I suspect that is also when their diets evolved to being more carnivorous, our tree-dwelling cousins are still mostly vegetarian.

    Which also explains why we have vestigial tails and why humans are so prone to back problems, we were originally tree-dwellers and walking upright is not our "natural" state.

    Blessings on your Journey!

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  • Anonymous
    8 years ago

    Good question. When some of the "common ancestor" primates left the forest they needed to become more intelligent to build and use tools to make things like shelter etc. So evolution took place. Look t how monkeys are perfectly adapted for the forest, and look how we are perfectly adapted to our sheltered city life style.

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  • Anonymous
    8 years ago

    This is known only to Mother Nature. Except her nobody can answer this.

    What I need is breakfast before 10 am, sufficient Lunch between 2 & 3 pm and light dinner before 9 pm.

    Browse the internet to answer good questions till 10 pm. I am getting more knowledge by answering questions.

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  • Nous
    Lv 7
    8 years ago

    Why do BAD Chrsitians keep trying to hide behind the "Common Ancestor"?

    What are you afraid of?

    What are you so afraid of that you ignore the truth?!

    Primates are mammals that include lemurs, monkeys, apes and humans.

    The Strepsirrhini, or “wet-nosed” primates, which include lemurs and lorises, branched off around 63 million years ago.

    Old World monkeys and apes divided from New World monkeys about 40 million years ago.

    Aegyptopithecus zeuxis, which probably resembles the common ancestor of New World monkeys and apes, lived about 29 million years ago.

    The apes split from Old World monkeys about 25 million years ago.

    Humans and chimpanzees diverged 5-7 million years ago.

    Of the macaque's nearly 3 billion DNA base pairs, 93.5 per cent are identical to those in the human genome. This is not unexpected for a species whose lineage diverged from our own about 25 million years ago. The human and chimp genomes, which diverged just 6 million years ago, are about 98 per cent identical.

    One puzzling discovery is that several mutations that cause genetic diseases in humans - such as phenylketonuria and Sanfilippo syndrome, which lead to mental retardation - are the normal form in macaques and, presumably, our own ancestors.

    So on each split the original got left behind to stay as it was!

    The first true hominid has been shown to almost certainly arrived in the Great Rift Valley but as a product of evolving from it's monkey and ape ancestry!

    Australopithecus sideba is later than Australopithecus africanus, and shares many features with early Homo. So it is, if you must, the missing link between Australopithecus africanus and Homo habilis.

    In many ways trying to deny these facts is worse than the creationinsts fantasies!

    Both show a desire to ignore the truth!

    The Pope, Catholic Church, Church of England and mainstream churches all accept the big bang and evolution!

    Lord Carey the former Archbishop of Canterbury put it rather well – “Creationism is the fruit of a fundamentalist approach to scripture, ignoring scholarship and critical learning, and confusing different understandings of truth”!

    Nice that christians and atheists can agree and laugh together even if it is at fundie expense!

    But behind the laughter is the despair at the fundamentalists striving so hard to destroy christianity by turning it from a religion to an ideology!

    Surveys suggest that 29% of American christians are so extremist in their beliefs that they fall well outside of the accepted bounds of christianity!

    Source(s): University of Michigan, Ann Arbor Baylor College of Medicine, Houston University of California, Santa Cruz.
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  • 8 years ago

    Because natural selection favored those particular adaptations. That's why all organisms evolve.

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  • Anonymous
    8 years ago

    Bifurcation is not accurate. There are many variations.

    http://www.youtube.com/watch?v=wh0F4FBLJRE

    Youtube thumbnail

    "So why was it necessary for humans to evolve in order to fit into our environment?"

    - When did it become necessary?

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  • 8 years ago

    Well, why was it necessary for moths and finches to adapt to their new environment? I can't tell if you're being sincere or sarcastic. ... Are you trying to provoke arguments?

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