Wow, well isn't this the million dollar question. How did humans evolve? Where did humans come from? While I have accepted the fact that I will never have a definitive answer within my lifetime, I still like to exhaust some possibilities.
Growing up I wasn't religious, never went to church, never learned the story of Adam and Eve and didn't really know who Jesus was until probably around the 6th grade. Around that age I had never thought about where humans came from evolutionarily until it was brought up by a peer. A very basic 7th grade education of evolution had me pretty convinced that humans did in fact evolve from primates and not knowing how phylogenies worked, in my head humans came directly from primates. Fast forward a few years into college when I got a much better education on evolution I learned that there are a several ways humans could have evolved and that not one of them is technically more accurate than the other, just accepted by the greater majority.
While I am still a firm believer in evolution, I have come to the conclusion that I can never make a definitive conclusion/decision about the evolution and origin of humans because new information is arising every single day! Coming to that, the question posed was, "If humans came from chimps, why are there still chimps?" This question makes me think, "Well maybe we didn't come from chimps but instead we just share a common ancestor and we both have derived traits." This seems like the most logical answer in my mind because why wouldn't all chimps undergo this evolution. Evolution is involuntary, it happens over thousands of years so how come only a select few of chimps evolved to become present day humans and others stayed chimps. Something there just doesn't add up...
A post I read said that humans didn't come from apes, humans ARE apes. We belong to the same subcategory of "great apes" that orangutans, gorillas, apes, bonobos and chimpanzees also belong to. I don't know why in common conversation we don't refer to ourselves as apes, maybe there is an underlying pretext that makes it sound inherently bad. Humans and chimpanzees share a common ancestor that I believe took two routes in the evolution fork in the road. One evolved to become present day chimps and the other evolved to become present day humans and a lot has happened between when they were the a common ancestor and the versions of which we recognize today. So many other influential aspects have been introduced that complicate the problem and make it harder to understand. Hopefully a common ancestor can be found and analyzed to answer this question but with that answers comes a million more unanswerable questions.
This isn't an easy question to answer because it is very controversial but there is one known aspect of it all, humans and chimps share 98.7% of their genetic sequencing. Theoretically, if humans came from chimps wouldn't they share 100% of their genetic sequencing? Or at least 99.9% of it? We are so similar yet have a difference of 1.3% that distinguishes us drastically from one another.
nice thoughts here, Ashley. It is interesting also to see where you are coming from with this question. You make some great points. Yes, we can reframe the question as "we didn't come from chimps, we came from the last common ancestor" Which i think works for some people. But I wonder if there is more to it. Would that convince someone who is skeptical (would anything??). I guess what i am wondering is could someone then ask, "ok, but if humans evolved cause they were best 'fit' to the environment then why didn't the other apes go extinct?"
ReplyDeleteYou also bring up a great question here about how we view ourselves. are we just apes that walk upright? or is there more to it than that? THis is really hard to answer. phylogenetically we are closer to the apes than to the monkeys, but maybe humans are so distinct from the apes that we are our own Family? i have no idea what the answer is there but something to think about
you might like this talk by my colleague Jon Marks: https://www.youtube.com/watch?v=fLfdKk9JEp8&t=2s
DeleteI think the best way to maybe answer why other apes didn't go extinct when humans were best 'fit' is because we aren't best fit for every environment. Both us and other apes have our advantages and disadvantages, what we lack speed and agility we make up for it in intelligence and creativity. While humans may be seen as the 'best fit' for certain regions there are still locations where apes thrive and live significantly better than we can. If myself and an ape are thrown into a jungle with nothing I can promise that i'm not coming out of there alive and that the other ape has a much higher chance of survival.