From the beginning of time, how long did it take the world's population to reach its first billion people?

What crime was king louis xvi accused of, what happened to him as a result?

In an industry in which there are several providers of a type of good, why can one business not charge much higher prices for their goods?

Jackson pollock described his art style in the following quote: “new needs need new techniques.… it seems to me that the modern painter cannot express this age, the airplane, the atom bomb, the radio, in the old forms of the renaissance or of any other past culture. each age finds its own technique.” what point is pollock making about the new styles of art?