Inventor wrote:
It would also explain why we are furless, like whales and dolphins, except for the top of our heads that stayed above the surface.
Yes. It's always been said that we lost our fur to help keep cool when we moved out onto the hot sunny plains... but fur helps to
protect from the sun. Even camels, those 'ships of the desert', have fur. The only totally hairless mammals are:
* some that live permanently underground, such as some types of molerat. This lifestyle obviously never applied to us.
* those that live permanently in, or spend vast amounts of time in the water, such as dolphins, whales and seals.
* a few such as elephants and rhinos who are all but confirmed scientifically to have had an aquatic ancestor - and even now may spend more than half their time bathing.