Around 25 million years ago, an evolutionary split occurred between our ancestors, the precursors of humans and apes, and ...

Human tails, manifesting as caudal cutaneous appendages, have long intrigued clinicians and anatomists alike. These structures, which may be either vestigial remnants of embryonic development or ...

(CNN) -- Humans have many wonderful qualities, but we lack something that's a common feature among most animals with backbones: a tail. Exactly why that is has been something of a mystery. CNN — (CNN) ...