Can we tolerate extreme temps?

First of all, you know the way a polar bear can be in extreme cold, as a camel can be in extreme heat and be perfectly fine? Well, FROM WHAT IVE HEARD, we used to have that same ability, although it died out centuries ago. Apparently, we had that ability in our abdula ablongada, (hope i spelled that correctly) but after we began to wear skins and things as clothing, the ability shutoff, as there was no longer a use for its function. There is a team of scientists, i hear, working on a chip that will be implanted in the brain to give this ability again. Weird. Kinda cool.

Why is this in Aicraft Projects?