How did Mary Leakey’s discovery change the modern understanding of prehistoric humans?

The bone she found provided evidence that early hominids made tools in East Africa almost 2 million years ago.

Explanation:

The remains she dug up at Olduvai Gorge proved Homo erectus were the first to use tools. hope this helps you :)

Jacob is said to have had twelve sons by four women, his wives, Leah and Rachel, and his concubines, Bilhah and Zilpah, who were, in order of their birth, Reuben, Simeon, Levi, Judah, Dan, Naphtali, Gad, Asher, Issachar, Zebulun, Joseph, and Benjamin, all of whom became the heads of their own family groups, later known as the Twelve Tribes of Israel, and it is also known that he had a daughter, Dinah.[3] According to Genesis, Jacob displayed favoritism among his wives and children, preferring Rachel and her sons, Joseph and Benjamin, causing tension within the family—culminating in Joseph's older brothers selling him into slavery.