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Scientists think that a giant asteroid, which broke up long ago in the main asteroid belt between Mars and Jupiter, eventually made its way to Earth and led to the extinction of the dinosaurs. This artist's concept shows a broken-up asteroid.

Overgrazed Land. Pennington County, South Dakota (1936) is one of several photographs Arthur Rothstein took to document dry, sun-baked earth of the South Dakota Badlands.

Where the Sun Sets Twice
NASA's Kepler mission has discovered a world where two suns set over the horizon instead of just one. Image credit

This artist's conception released by NASA on Wednesday shows the Space Launch System as it would look on the launch pad.

Radar sounding technology developed to explore the subsurface of Mars may soon be used to find water buried deep beneath Earth's deserts.

Sentilla Analytics for Cloud allows IT to input the types of tasks and resources needed for them into a form (bottom) from which analytics produce a cost-comparison chart for dedicated versus virtualized, private- or public-cloud implementations.

The software uses features like eyes and mouth to identify
individuals within a wild population.

NASA's GRAIL spacecraft successfully launched from Cape Canaveral Air Force Station, Fla., at 9:08 EDT (6:08 PDT) on Sept. 10, 2011. As depicted in the artist's concept on the right, the twin spacecraft, GRAIL-A and GRAIL-B will work in tandem to study the lunar interior, from crust to core, and to advance understanding of the thermal evolution of the moon.

Laser Communications Relay Demonstration (LCRD) will act as a long-haul fiber-optic network--sans the fiber.