Early in pregnancy, something surprising happens. Every human embryo develops a tail. It is not symbolic or imagined. A real extension forms at the base of the spine, complete with vertebrae. Later, ...

Add Yahoo as a preferred source to see more of our stories on Google. A sculptor's rendering of the prehistoric hominid 'Australopithecus afarensis' is displayed as part of an exhibition that includes ...

The human body is full of evolutionary compromises. The loss of the tail may be one of the clearest examples of how change comes with cost. Long before humans walked upright, long before even apes ...

Great question, and it gets to the heart of what we are as humans. Think about your own family – do you have cousins? If so, you and your cousins share grandparents and these are your common ancestors ...