how come we do not have tails like animals

Question: how come we do not have tails like animals
- Keywords:
  animal,
  tail
Asked by bubbles to Aimee, Gemma, Hussain, Robert, Ross on 16 Nov 2015.
- Aimee Goodall answered on 16 Nov 2015:
  
  We used to have tails and still have a tail bone at the bottom of our back, this was needed when we still lived in trees and used it for balance. Humans have evolved to walk on two legs and now don’t need a tail like some other animals, like fish who use it to get though water faster!

Question: how come we do not have tails like animals