Timothy Gutowski

May. 02, 2008

Calculating Your Carbon

How large is your 'carbon footprint' -- the amount you contribute to greenhouse gas emissions? We'll talk to a researcher looking at energy usage around the country, from homeless people to the rich and famous.

carbon footprint, emissions, greenhouse gas, global warming, climate change

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Michael Pollan Talks Plants and Food

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Whale Tales

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Mystery Box

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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