In mice, at least, it seems to extend lifespans. Those results have not been confirmed in humans, but aspiring Methuselahs (including Mr Johnson) are taking it anyway. Ritalin, prescribed to treat ...

“Ferrets are diphyodont animals with similar dental patterns to humans.” Is Bringing a Dead Brain ‘Back to Life’ Possible? Now, scientists will see just how similar, because humans are ...

By Carl Zimmer Humans, unlike most other species, have a knack for making tools. Six million years ago, our apelike ancestors probably smashed nuts with rocks or caught termites with sticks.