Now it was light enough to leave. Moon-Watcher picked up
the shriveled corpse and dragged it after him as he bent
under the low overhang of the cave. Once outside, he
threw the body over his shoulder and stood upright - the
only animal in all this world able to do so.
Among his kind, Moon-Watcher was almost a giant. He was
nearly five feet high, and though badly undernourished
weighed over a hundred pounds. His hairy, muscular body
was halfway between ape and man, but his head was already
much nearer to man than ape. The forehead was low, and
there were ridges over the eye sockets, yet he unmistakably
held in his genes the promise of humanity.
[ 2001: A Space Odyssey, by Arthur C. Clarke ]