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How soil and squirrels offer cues on Alaska climate change
On the Alaskan tundra, researchers are tracking the march of global warming. Science correspondent Miles O’Brien explores how soil composition and the sleep schedules of squirrels might offer data on the ways warmer temperatures are affecting ecosystems.
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Gold Lures Illegal Miners to Peru’s Rainforests
In southeastern Peru, where the Andes Mountains meet the Amazon, lies one of the world's richest ecosystems and the destructive lure of gold. In a collaboration with the Pulitzer Center on Crisis Reporting, special correspondent Steve Sapienza reports on illegal…
The Return of the Gray Wolf
Science correspondent Miles O'Brien reports on the successful return of a once endangered species now caught in the crosshairs of cattle ranchers.
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5 Years Later, Scientists Still Puzzled by Honeybee Decline
Five years ago, honeybees began dying in large numbers and hives were becoming defunct. Spencer Michels reports on the scientists who are still trying to figure out why this is happening and what can be done to help the problem.
