Scientists may be cracking mystery of big 1872 earthquake

Geologists may be close to cracking one of the biggest seismological mysteries in the Pacific Northwest: the origin of a powerful earthquake that rattled seven states and provinces when Ulysses S. Grant was president.

US shuttle debris surfaces amid Texas drought

A piece of the ill-fated space shuttle Columbia has surfaced in eastern Texas, where a severe drought has dried up a lake and exposed debris from the 2003 accident, NASA said Tuesday.

Video: The latest look at 'first light' from Chandra

NASA's Chandra X-ray Observatory has captured many spectacular images of cosmic phenomena over its two decades of operations, but perhaps its most iconic is the supernova remnant Cassiopeia A.

Northwest power surplus may halt wind energy

(AP) -- The manager of most of the electricity in the Pacific Northwest is running such a surplus of power from hydroelectric dams that it put wind farms on notice Friday that they may be shut down as early as this weekend.

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