Human hands 'designed to throw punches'

Opposable thumbs: one of the features that separates us from other apes, a contributor to the tool use that's made us the dominant species on the planet. Makes you feel quite smug, right? Well, not so fast.

Ancient stencils may show Neanderthal hands

The well-known cave paintings at El Castillo in Northern Spain possibly weren't produced by modern humans at all, say scientists, but by Neanderthals.