How is darwin’s point and the plantaris muscle an example?
Anyway, I was hoping for a bigger list.
> How is darwin’s point and the plantaris muscle an example?
The plantaris muscle no longer exists in 9% of humans. Darwin’s point is missing in 90%. Both exist at 100% in all our nearest relations, so they’ve been more or less slowly breeding out of the human population as we no longer need/use them. The extrinsic ear muscles, that are only able to slightly wiggle the ears, and that only in a subset of humans, would be another fine example.
One I read of is the attachment of the gut to the back surface of the abdominal cavity, in common with quadrupeds, for whom it makes sense. For us, according to the source, it is a liability, and leads to complications in senescence.