Throughout Earth's history, the climate has changed. The Earth has experienced several periods of extreme
cold, called ice ages.

Which best expresses the radical republican philosophy of reconstruction? a. the confederate states were conquered territories that should be ruled by military governors. b. the southern states actually never left the union. c. if ten percent of the voters of a state that had seceded took an oath of allegiance to the union, then it should be readmitted as a state.

In human relations, the irritation threshold is the

Why is mary salter ainsworth a central figure in psychology?