October 31, 2006 • 1h 30m
From microscopic bacteria to the largest animals, this installment explores the incredible biodiversity of the Earth, highlighting...Read more
January 4, 2007 • 1h 30m
Discover why fresh water is the most precious resource on Earth, vital to life and prosperity, but is also one of the most threate...Read more
April 17, 2007 • 1h 30m
Covering 72 percent of the planet, the sea is an extensive, but not inexhaustible, resource. This episode sheds light on how to pr...Read more
July 5, 2007 • 1h 30m
As man's impact on Earth reaches an all-time high, meet innovators who are attempting to reverse the damage and write a new contra...Read more