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 :)

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.