|
Billions of years ago Earth was covered by a single ocean. Today nearly a third of the land is dry. Aubrey Manning follows a trail of clues from Bolivia to Alaska and New Zealand to find out how the change came about. |
| 
No comments available yet. Be the first to comment on this episode!
To be able to post your thoughts and comments about this episode, you have to be a registered user and logged in!
[ Login | Register ]
|
|