News tagged with asteroid impact

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Features on asteroid revealed by radar

(PhysOrg.com) -- Radar imaging at NASA's Goldstone Solar System Radar in the California desert on Dec. 11 and 12, 2010, revealed defining characteristics of recently discovered asteroid 2010 JL33. The images ...

Jan 12, 2011
4.7 / 5 (7) 0 | with audio podcast

The day the algae died

The P-T mass extinction may have been instigated by populations of algae dying. According to one group of scientists, this die-off of large numbers of relatively simple life forms caused a crash in the ocean's ...

Dec 14, 2010
4.1 / 5 (13) 8 | with audio podcast

Getting WISE About Nemesis

Is our Sun part of a binary star system? An unseen companion star, nicknamed 'Nemesis,' may be sending comets towards Earth. If Nemesis exists, NASA's new WISE telescope should be able to spot it.

Mar 11, 2010
5 / 5 (10) 2

A Tale of Planetary Woe (w/ Video)

Once upon a time — roughly four billion years ago — Mars was warm and wet, much like Earth. Liquid water flowed on the Martian surface in long rivers that emptied into shallow seas. A thick atmosphere ...

Nov 11, 2009
4.2 / 5 (11) 5