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Microbes may once have happily existed on the surface of Mars, according to chemical analysis of a sedimentary rock in the Red Planet's Gale crater. NASA geologist and exobiologist David Blake discusses evidence for an ancient freshwater lake in the crater, and describes the mineral-chomping microbes that may have thrived there.

Fury pleaded guilty to two counts of arson. He admitted to setting the fire to get out of work early. The fire caused $400 million in damage.

The NHL will shuffle its teams before next season, moving from three divisions in both the Eastern and Western Conferences to a total of four divisions. The league's owners approved the plan Thursday; the players' association gave its OK last week.

House State Government Committee Chairman Brent Yonts says lawmakers need to deal with legislative redistricting this year to avoid chaos heading into…

Researchers say the war will cost the U.S. $2.2 trillion, a figure that far exceeds the original government estimate of $50 to $60 billion. If you factor in borrowing costs, the U.S. will end up paying nearly $4 trillion for the invasion.

Science writer Carl Zimmer says we're not going to bring back dinosaurs. But we might be able to resurrect other extinct species.

Canadian officials are investigating a "highly unusual" incident in which a driverless van traveled across the runway at Toronto's Pearson International Airport, at the same time an Air Canada flight was landing. The plane's pilots did not heed commands to abort their landing.

The comet's now putting on a show in the Northern Hemisphere's night sky. Using its orbiting observatories, NASA captured a stereo view from space that offers a unique perspective.

Two hedge funds affiliated with SAC Capital Advisors have agreed to the settlements. They did not admit any wrongdoing.

Ohio Republican Sen. Rob Portman's endorsement of same-sex marriage, coming less than two weeks before the U.S. Supreme Court hears a pair of challenges to same-sex marriage bans, is being characterized by gay rights activists and others as historic.