[Junior]

What shakey suppositions? These guys did actual research and testing, and the testing bore out their hypotheses. You come along, who has never done a lick of research in this field, and really have no clue as to what's being discussed, and airily dismiss the work of actual researchers

[Pharmboy]

YOU are the one who has not a clue, as you sound like a fool. For them to leap from a gene for skin color to hairlessness is a MAJOR shaky supposition. And what made US so special as to be the only primates to use this strategy for survival? But based on the deductive reasoning you've displayed so far, I would not expect a room-temperature IQ such as yours to grasp this point.

Buh-bye Junior (a good handle for you, BTW).