What natural element is one of the best preservers of prehistoric life?

What clues in fossils help scientists identify different ice ages?

What does the term “escalation” refer to?

When did martin luther king, jr. deliver his famous "i have a dream" speech? a. during the montgomery bus boycott b. during the birmingham campaign c. during his acceptance of the nobel prize d. during the march on washington

How did the protestant reformation and scientific revolution advance individualism and liberal reforms?