Total Pageviews

Sunday 3 August 2014

Giant asteroids reshaped Earth 4 billion years ago

Hadean Earth

Earth experienced four impacts by titanic space rocks more than 600 miles across.



from Geek.com http://ift.tt/1onDKgn

via IFTTT
Posted by at
Labels: ,

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)