Who doesn't love a good zoo? The animals, for one. Many of the most popular attractions at zoos are animals like tigers and bears, who are particularly prone to boredom and depression when cooped up. That's why some people want to close traditional zoos and take a different approach.
Groups like the Green Tea Coalition are pitching conservatives an unlikely message on conservation and clean energy: Not only is it good for the free market, it's good for national security, too. But the movement has a lot of convincing to do, and faces opposition from well-financed opponents like the Koch brothers.
The Rocky Mountain Arsenal Wildlife Refuge, outside of Denver, didn't start out as a conservationist’s dream: During World War II, the army built a chemical weapons factory on that spot. The plant produced mustard gas, napalm — an entire arsenal of deadly chemicals. Now it’s one of the largest wildlife sanctuaries in the country.
Scientists are establishing a worldwide network of deep-sea listening posts connected to the Internet. It allows researchers -- and the public -- to hear whales, ships, and other underwater sounds. But the US Navy is uneasy.
People in the West African country of Senegal have made their living from the sea for generations. But overfishing has put the region's fish stocks in crisis. And the Senegalese are struggling to find a solution. Jori Lewis has this report.
Lions who repeatedly kill livestock are a big problem for farmers, but killing such "problem lions" is an equally big issue for the threatened animals. To save both cattle and cats, conservationists are now trying out mock hunts to chase away lions without getting rid of them for good.