US authorities are looking at Second Life as part of a crackdown on Internet gambling.

Dell is the first computer system supplier to ship 1 terabyte (1,000 gigabytes) hard drives targeted at users needing to store large amounts of digital media.

Scientists have long known that a major ingredient in comets is water ice, but they were unsure whether the ice was contained mainly inside or if it could be found on the surface as well. A new analysis of data from NASA's Deep Impact mission last year provides the first evidence that water ice can indeed exist on a comet's exterior. In a new study released Thursday in an online edition of the journal Science, researchers report that the surface of Tempel 1, the comet targeted by Deep Impact, has three small pockets of water ice. Tempel 1 has a surface area of roughly 45 square miles, or 1.2 billion square feet. The area taken up by the water ice, however, is only 300,000 square feet. The rest of the comet surface is dust. "It's like a seven-acre skating rink of snowy dirt," said study co-author Peter Schultz of Brown University.