LED replacements hit stores empty of 100W bulbs

(AP)—The first LED bulbs that are about the same size and brightness as regular 100-watt bulbs are reaching stores. They provide an alternative to compact fluorescents after the federal government banned the production ...

Curiosity's laser leaves its mark

Curiosity's head-mounted ChemCam did a little target practice on August 25, blasting millimeter-sized holes in a soil sample named "Beechey" in order to acquire spectrographic data from the resulting plasma glow. The neat ...

What keeps the Earth cooking?

What spreads the sea floors and moves the continents? What melts iron in the outer core and enables the Earth's magnetic field? Heat. Geologists have used temperature measurements from more than 20,000 boreholes around the ...

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