The olduvai gorge in tanzania is the site of
a. many findings of the earliest humans.
b. the world's largest waterfall.
c. the world's longest suspension bridge.
d. many findings of the earliest dinosaurs.

What triumphs did the late 19th century witness in the realms of industrial growth, urbanization, and technological innovation? what challenges did these developments pose for urban dwellers, workers, and recent immigrants? how did city officials and everyday citizens respond to these challenges?

In an effort to end the civil war, in 1864 the union planned to

List three reasons why explorers began to explore new, and old areas. [[ps: doesn't explicitly say where. i think it's more in general.