'Bright light' on Mars is just an image artifact

Thanks to everyone who has emailed, Tweeted and texted me about the "artificial bright light" seen on Mars. And I'm so sorry to disappoint all the folks who were hoping for aliens, but what you see above is just an image ...

GM to invest $449M in two Detroit-area factories

General Motors plans to invest $449 million in two Detroit-area factories to build the next-generation Chevrolet Volt hybrid electric car and two unspecified new vehicles.

Twitter profiles get Facebook-style revamp

Twitter on Tuesday began revamping profile pages to let users display more of their online personalities, giving the popular service a Facebook-like feel.

A new twist makes for better steel

In steelmaking, two desirable qualities—strength and ductility—vary indirectly: Stronger steel is less ductile, and more ductile steel is not as strong. Engineers at Brown University, three Chinese universities, and the ...

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