US holiday season online spending climbs

Industry tracker comScore on Thursday reported that US shoppers spent a total of $42.3 billion online during the year-end holiday season—a 14 percent jump from the same period in 2011.

Martian rock from Sahara desert unlike others

Scientists are abuzz about a coal-colored rock from Mars that landed in the Sahara desert: A yearlong analysis revealed it's quite different from other Martian meteorites. Not only is it older than most, it also contains ...

Jumping droplets help heat transfer

Many industrial plants depend on water vapor condensing on metal plates: In power plants, the resulting water is then returned to a boiler to be vaporized again; in desalination plants, it yields a supply of clean water. ...

International operation nabs 245 child porn suspects

An international police operation into child pornography led to the arrest of 245 people and the rescues of 123 children, mostly in the US, the US immigration enforcement agency announced Thursday.

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