CK-12 Biography of the Earth

I find it interesting that-

– You can find shells on top of mountains.

– Antarctica used to be a cold place

– If a rock contains a fossil of something that lived for a certain area of time,  you can tell what age the rock is.

– Scientists don’t exactly try to find how old the rock was, they look at which order the rocks were formed.

– Intrusions are able to happen through the rocks.

– How our period had the most advancement in the most short period of time.

– Earth has a similar age with the rest of the solar system.

– If Earth history is equal to a year, all of human history has taken place in the last 12 minutes.