Whst evidence did mary leakey use to understand how early humans taught and felt

 She used the stone tools to understand how the early hominids were taught and fell.

Explanation:

  She was a British paleoanthropologist who, along with her husband made several discoveries about the early humans who walked the Earth.

  They made their major discoveries on an African site called Olduvai George where they found the skull of the first human ancestor separate from the monkeys. They also found several stone tools that Mary developed a system to classify them and know what was its purpose.

  I hope this answer helps you.