Five years after landing on Mars, Spirit and Opportunity march on. Read more…

The Milky Way is not a little sister to Andromeda after all, new research shows. Read more…

A new study finds that 54 percent of teens talk about behaviors such as sex, alcohol use, and violence on the social networking giant MySpace — presenting potential risks even if all they’re doing is talking, researchers said Monday. Read more…

Five years after landing on Mars, Spirit and Opportunity march on. Read more…

For a century the gasoline engine has remained largely unchallenged, seeing off all pretenders to its crown. But with concerns about greenhouse gas emissions and a host of new contenders looming large in the rear view mirror, is the gasoline-fueled automobile due to be overtaken by a fleet of cleaner, leaner rivals? Read more…

Mammoths were a hearty group of giants that went extinct not because of climate change or overhunting by early humans, but a “perfect storm” of conditions, according to new research.

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Which comic book characters are positioned to make 2009 a breakout year for themselves?

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