01:38
The Delicate Balance, Part 2: Species Loss
Humans have altered the habitats of life forms from microscopic to whale-sized. General estimates of species loss is tens of thousands of species per year.
05:36
Ecology: Biosphere 2: Studying Extinction First-hand
The accidental introduction of a common greenhouse ant into Biosphere 2 resulted in the loss of their pollinators. The impact of the loss was felt immediately in the miniature biosphere. The size of the earth and the redundancies that exist in the s...
01:42
Disappearing Species and the Endocrine System
Zoologist and World Wildlife Fund senior scientist Theo Colborn talks about the impact of environmental toxins on the endocrine systems of exposed animals. Dr. Colborn observes that some of the species being affected have been in existence for milli...