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BelugaWhale

What Are Whales?

News posts

The word "whale" may bring to mind the image of a blue whale, the largest animal ever to have lived. But did you know that dolphins and porpoises are also specialized whales? Today, there about 80 species of living whales, or cetaceans. Among these marine mammals, there are two groups: baleen and toothed.

Tags: Exhibitions, Mammals, Whales

Donald Yeomans Podcast Thumbnail

Frontiers in Astrophysics: Near-Earth Objects with Donald Yeomans

Podcasts

As observers of a meteor that crashed in Russia’s Chelyabinsk region today can attest, near-earth objects that enter the earth’s atmosphere can wreak destruction. But these objects, which also include comets and asteroids, also provide clues to the solar system’s origins and could someday serve as stepping-stones to space exploration. In this podcast, Manager of NASA’s Near-Earth Objects program, Donald Yeomans, discusses the ongoing quest to find near-earth objects before they find us.

Tags: Meteorites, Podcasts

Harzardous Asteroids

How Do Researchers Track Near-Earth Asteroids?

News posts

Later today, an asteroid designated 2012 DA14 will pass just 17,200 miles over Earth’s surface. Although this 150-foot space rock will slip harmlessly by, researchers estimate there are nearly 500,000 near-Earth asteroids. So far, they’ve tracked the orbit of 9,600. How do researchers track asteroids, anyway? A Science Bulletins video explains more about the process, and more about the odds of an asteroid collision with Earth.

Tags: Meteorites, Science Bulletins

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