The city of harappa was located along a tributary of the river.
a. nile
b. indus
c. tigris
d. euphrates

This word for a bug or malfunction was popularized in the 1962 book into orbit by the mercury astronauts

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Why is immigration so important today?