Skip to main content
Close

Welcome to the new Annenberg Learner website! All of the current series have migrated to our new, streamlined interface. The legacy site is available at archive.learner.org through January 31, 2020.

Close
Menu

The Habitable Planet: A Systems Approach to Environmental Science 

Many Planets, One Earth Video

The early Earth was a much different planet than the one we know today. Ancient rocks provide evidence of the emergence of oxygen in the atmosphere and of a frozen Snowball Earth. Scientists Paul Hoffman and Andrew Knoll look at these clues to help explain the rise of complex animal life.

View Transcript

 

 

Series Directory

The Habitable Planet: A Systems Approach to Environmental Science 

Credits

Harvard Smithsonian Center for Astrophysics in association with the Harvard University Center for the Environment. 2007.
  • Closed Captioning
  • ISBN: 1-57680-883-1

Units