We lost our fur.
Even though some people might find this hard to believe, but humans have the exact same number of hairs on their bodies as chimpanzees. The only difference would be that our hairs are so fine that they’re practically invisible.
It’s still not certain why we lost our protective fur over the centuries, but research suggests that it might be because early humans needed to sweat more easily. Some researchers also believe our ancestors used to be partly aquatic, or the fur was the ideal environment for parasites (lice and ticks).
However, the most believable theory sustains that early humans needed to cooperate more after they moved out of the trees directly into the savanna. It’s exactly what we did with wolves in order to produce dogs. A very interesting study that was conducted over more than 40 years, bred Russian foxes for obedience.
The study began in the 1950s, and for more than 4 decades, the researchers worked on transforming adult fox’s behavior into large cubs. The foxes ended up playing a lot, developing floppy tails, dropping ears, and patterned fur. It is believed that it happened the same with humans. We developed large heads, small mouths, and finer body hair.
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