Cathy Cahill

Feb. 22, 2013

How Wood Smoke Is Dirtying Alaska’s Air

Cathy Cahill, of the University of Alaska Fairbanks, discusses air quality in the Last Frontier.

air pollution, fires, wood burning, heating, smog, particulates, air quality

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Michael Pollan Talks Plants and Food

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How Humpbacks Hunt With Bubbles

Humpback whales blow bubbles around schools of fish to concentrate them for easier capture. It's called a bubble net, says David Wiley, research coordinator for Stellwagen Bank National Marine Sanctuary, and it's visible as a ring of bubbles at the surface. Now, with underwater digital tracking tags and custom visualization software, whale researchers can see what the whales are doing underwater when they're bubble-netting.

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