When did she make this discovery of zijathropus man?

The discovery of "Zinj" or "Zinjantropus" (now more commonly referred to as Australopithecus boisei) was made by the paleoanthropologist Mary Leakey in 1959. She uncovered the fossilized remains in Olduvai Gorge, Tanzania. This discovery was significant in understanding human evolution, as it provided insights into early hominins and their adaptations.