What made it possible for Renaissance ideas and art to spread throughout Europe? Prince Henry's astrolabe Galileo's telescope Gutenberg's printing press Martin Luther's 95 Theses

Gutenberg's printing press

Explanation:

They could now spread the news on paper with a printing press.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: