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When I was a child I remember hearing humans came from monkeys. I asked myself, "Then why are monkeys still around?" A valid question. The problem with the initial statement though is that we did not come from monkeys, but rather we share a common ancestor.
Yes we share a common ancestor, a LONG time ago but they still evolved separate from us in terms that after this common ancestor we evolved separately, so while millions of years ago we were the same, its been millions of years and ALOT of changes so WHY do we relate so much and say we share a common ancestor likes it's a amazing thing? This is the crux of my question. If we go back far enough we have a common ancestor with a cat, yet you don't see mainstream media or scientists fascinated, and doing experiments on cats to try and find out more answers about our origins?
you don't see mainstream media or scientists fascinated, and doing experiments on cats to try and find out more answers about our origins?
our common ancestor which was a fish I believe, which we have more dna in common with than monkeys
For this reason, I would be more trusting of genetic similarity as determined by whole-genome sequencing, rather than by comparing just one or a few proteins, which would have been a considerable achievement just 20 or 30 years ago.
The biggest question is why the hell do psychological experiments on monkeys to "See how long ago we evolved our Loss/Gain decision making processes" when we split from them in the evolutionary tree long long ago?
It's a balance between wanting to experiment on a creature as similar to us as possible, but not so similar that experimenting on them makes us uncomfortable (although the degree of discomfort has increased over time). Monkeys are simians, sometimes known as 'higher primates', which makes them evolutionarily closer to us than all non-simians, but they're not apes, so they're not so close that it feels like experimenting on a relative.With respect to subtle behavioural investigations like decision-making processes, the idea is to discover how recently such traits developed. If monkey behaviour and lifestyle has changed little since the common ancestor with humans, and both humans and monkeys show the same decision-making traits, there's a strong probability that we've inherited those decision-making traits from the common ancestor, which gives us useful information about the order of evolution of our behavioural traits.