How did the greeks defeat the persians?

Science made little real progress in europe in the middle ages because most scholars thought that all knowledge must fit with church teachings. science was considered to be related to magic and witchcraft. the study of science was banned from medieval universities. translations of greek science texts still had not reached medieval europe.

Which of the following were lyndon johnson's goals as president?

What was the final spark that ignited the “european powder keg” and started world war 1