Donald Yeomans

Feb. 22, 2013

Russia Meteor Renews Focus on Asteroid Threats

Astronomers weigh in on how to keep the planet safe from near-Earth objects.

meteor, asteroid, space junk, collision, space rock, debris, explosion, planetary defense, near-earth objects

Dec. 28, 2007

Asteroid Heading Toward Mars

An asteroid has a 1-in-75 chance of hitting Mars in late January. Find out why astronomers are on the edge of their seats.

asteroid space impact mars

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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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