John R. Clifford

Nov. 30, 2007

Canadian Beef Imports

Canadian cattle up to 8 years old can now be imported into the U.S., according to rules that went into effect earlier this month. That has some health advocates worried.

cattle, cows, BSE, mad cow disease, agriculture

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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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