The Earth is really, really old. Over 4 1/2 billion years old, in fact. How do we begin to comprehend a number that large? It helps to put it on a more fathomable scale. Watch to see where Earth's ...
Sciencephile the AI on MSN7d
What is Earth's History?
Science has been through a lot since the long history of the planet Earth. And people have philosophized and thought about it for a long time. I ...