How did Louis agassiz get his theory that glaciers covered the earth?

Answer 1

Louis Agassiz collected his evidence that glaciers covered most of the earth because he grew up and lived in Europe. In Europe he found several rocks that were very scratched and/or polished. And since there was nothing in Europe that pointed to why this happened he automatically thought that Europe was covered by glaciers. So we know that Agassiz loved to travel so when he traveled he saw more and more of these rocks in different places around the world. So if he figured that if he saw them in Europe that means there must have been alot of glaciers around the world. And now thanks to Mr. Louis Agassiz and our present technology we found that his theory of glaciers around the world was indeed correct.

Tyler Hickey from the the Harvard Institute of America.