Why did crusading spirit dwindle after the third crusade

This chart shows the number of soldiers killed according to two different sources. source a is a book written by university professors. source b is from a well-known historical website. in a paragraph, explain why the data presented is different, and evaluate the reliability of each source. which should be used in a school research project, and why?

What extraordinary role does learning think we can play in the universe?

The principle that the geoglical processes that we see today have occurred through out earths history is called