The spread of Humankind to inhabit all the part of the Globe was a significant advancement in the Paleolithic age.
The Paleolithic Age is commonly known as the Stone Age, begun roughly 500,000 years ago and ended around 6000 B.C.E. People in this period produced complex tools and objects made out of stones. This age comprises the initial widespread use of technology as humans advanced from simplistic to a more complicated developmental stage and the spread of Humanity from the Savannas of East Africa to the rest of the world.
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Slavery, condition in which one human being was owned by another. A slave was considered by law as property, or chattel, and was deprived of most of the rights ordinarily held by free persons.
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Not exactly sure what you mean. However, here are some formulas:
S=D/T
D=S*T
T=D/S
D= Distance
S=Speed
T=Time
