What matters to you.
0:00
0:00
NEXT UP:

Episode 11, Season 40<br> Australia's First 4 Billion Years: Monsters

Season 40 Episode 11
Australia's First 4 Billion Years: Monsters

About the Episode

Some 250 million years ago, some of the largest, most dangerous reptiles ruled this land.

Aired: 04/23/13 | Expires: 04/08/23 | Runtime: 54m 15s