The Earth is roughly four and a half billion years old, and life started to emerge shortly after the first billion. Our planet's atmosphere is made up of one of the world's most reactive elements - oxygen.
The Earth is roughly four and a half billion years old, and life started to emerge shortly after the first billion. Our planet's atmosphere is made up of one of the world's most reactive elements - oxygen.
General Note
Originally released by WorldWideMedia Organization, 2008.
Streaming video file encoded with permission for digital streaming by Infobase on May 08, 2015.
Content Note
Earth's Varied Environments (6:19); --Global Ocean Systems (5:07); -- Global Climate System (1:57); -- Global Water System (2:25); -- "Connoisseurs of Chaos" Part Six (4:30); -- Future of Earth's Ecosystem (4:17); .
