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This radar image of asteroid 2005 YU55 was obtained on Nov. 7, 2011, at 11:45 a.m. PST (2:45 p.m. EST/1945 UTC), when the space rock was at 3.6 lunar distances, which is about 860,000 miles, or 1.38 million kilometers, from Earth.

Scientists have found bones in Brazil that belonged to a 20-foot-tall sloth that lived some 10,000 years ago.

Shown here in an ornamental scroll, ITRI's e-paper, which can be produced in normal cut sheet formats too, indefinitely retains images printed on it thermally.

Once filleted, it's easy to confuse one white-fleshed fish for another.

Cells that make up the intestinal wall form fingerlike projections (blue) and release antibacterial proteins that keep bacteria (green) at a distance.

enterprises in securing their computers, finding the optimal level of security balances cost of breeches versus cost of security measures.

A cycad stands at the United States Botanic Garden in Washington, D.C., on Oct. 19. The 300 "modern" cycad species burst onto the scene about 12 million years ago, though the lineage of cycads extends back 300 million years.

This week at the McAfee SecurityAlliance Partner Summit, the company finally rolled out its first product co-developed by its acquirer of nine months, Intel, and announced that it would be launching some new channel initiatives for partners while at the same time culling a number of inactive partners to better support the consistent producers.

A flat panel module generates electricity with no wires attached, by virtue of built-in solar cells that split water into hydrogen fuel and oxygen.

This artist's concept illustrates an icy planet-forming disk around a young star called TW Hydrae, located about 175 light-years away in the Hydra, or Sea Serpent, constellation.