OH 24

OH 24 (nicknamed "Twiggy") is a fossilized skull of the species Homo habilis. It was discovered in Olduvai Gorge, Tanzania by Peter Nzube in 1968. The skull was found crushed almost flat and was therefore named after the famously skinny model of the time Twiggy.

It is estimated to be 1.8 million years old.

Its characteristics include a slightly forward sloping face and larger brain typical of H. habilis.