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Looking for extraterrestrial smog may be a good way to search for alien intelligence, according to a Harvard researcher.

Cyclists may soon have a convenient way to discourage bike thieves, thanks to new designs that use parts of the bikes themselves as locks.

Faulting the U.S. approach to hostage situations like the one his brother, James Foley, was in, Michael Foley says, "We are sitting on prisoners in Guantanamo. It doesn't even have to be financial."

Deputy National Security Adviser Ben Rhodes said the beheading of American journalist James Foley is tantamount to an act of terror against the U.S.

Russia has sent a large number of trucks into eastern Ukraine without the authorization of the Ukrainian government or Red Cross supervision. Moscow says the trucks are carrying aid for civilians, but the Ukrainians — together with NATO, U.S. and European leaders — say the move is a violation of Ukrainian sovereignty.

The death of Brazil's Socialist Party presidential candidate created an opportunity for his running mate, Marina Silva. Her entry into the race has upended the situation. Whereas the man she replaced was running a distant third in polls, support for Silva has surged.

Argentina calls them vulture funds, but those hedge funds have a legal right to demand payment. Still, is that moral when a nation is the debtor and its citizens will suffer as a result?

Nobody knew how people in Southern California were getting infected with the life-threatening fungus C. gattii. A 13-year-old helped figure out the source: three types of trees.

The attack, which killed more than 60 worshippers at Friday prayers, is the latest sectarian violence to rock the deeply divided country.

As attitudes toward homosexuality shift in the U.S., many gay men say that's created not just more legal freedoms but also greater freedom to express their gender identities.