Miles "Tails" Prower voice actor Colleen O'Shaughnessey will return to voice Sonic's sidekick in the live-action Sonic the Hedgehog 2 film. "Taking my old pal Tails for another adventure.

Humans’ closest primate relatives lost their tails about 25 million years ago, but exactly how has remained a mystery. A breakthrough in genetic research may finally offer answers.

WASHINGTON — Our very ancient animal ancestors had tails. Why don’t we? Somewhere around 20 million or 25 million years ago, when apes diverged from monkeys, our branch of the tree of life ...