PsychoSarah
Chaotic Neutral
That still doesn't make sense, monkeys and apes and chimps and orangutans and whatever are still alive today.
And human intelligence is still not explained very well.
We didn't come from a chimp species that lives today. Theoretically speaking, the ancestor that gave rise to both apes and humans probably had characteristics of both of its descendants. Based on fossils and DNA evidence, a creature such of this would have had a brain more resembling a chimpanzee, but would have walked upright as humans do. Interestingly, walking upright appears earlier than intelligence does.
The brain is the least understood organ in the human body. It is hard to understand how it could have evolved when we do not completely understand the workings of a modern brain. We can, however, trace the evolution of other features and organs much better, because we know their function and how they work much better. Evolution explains why humans have an appendix, which has never had a function in Homo sapiens, but does serve one in other apes.
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