Why did we lose our tails??

Question

i know we used to have tails, i am just wondering why we don't have it anymore.

Answer 1

Ha...Speak for yourself. I still have mine. Wait!! Oh no; you're right!!! It HAS gone.

Answer 2

It has to do with evolution and usefulness. It takes energy and resources to build a body part, so evolution will sometimes favor a lifeform that doesn't waste its time making vestigial structures. Humans lost their tales back when our most distant ancestors hardly resembled us. A tale can help keep balance and a prehensile tail is a useful extra limb for tree climbing. Our ancestors were becoming bigger, stronger, and lived in trees less and less (like apes, that spend a lot of time on the ground and in trees). The tails were becoming too light to help balance and too weak to hold them up. So as some mutant primates were born with less tail, it was hardly missed. We still have a hint of our old tails in the way our spine continues past our pelvis. Some infants once in a while are born with vestigial tails, but these are usually removed as they are just useless flesh ropes.

Answer 3

Evolution.  Losing the tail probably worked in our ancestor's favour as for one or more reasons it became more of a hindrance than a help.  Hopefully it won't take us millions of years to shake off creationism!