Who discovered the bonesof earliest known human at Olduvai Gorge in Tanzania?

Louis Leakey and Mary Leakey discovered many hominid fossils at Olduvai Gorge. One of the most important discoveries was the skull of Zinjanthropus boisei, which was found in 1959. This skull is one of the oldest known hominid fossils, and it provided important evidence for the evolution of humans.