Mary Leakey discovered ancient skull remains in Tanzania, Africa.
Research revealed the fossils were more than 3.75 million years old and were of an extinct ape, which is now believed to be an ancestor of humans.
Mary Leakey discovered ancient skull remains in Tanzania, Africa.
Research revealed the fossils were more than 3.75 million years old and were of an extinct ape, which is now believed to be an ancestor of humans.