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The Supreme Court ruled the federal Defense of Marriage Act is unconstitutional, and handed same-sex marriage supporters a victory in California. Host Michel Martin speaks with professor of constitutional law, Margaret Russell, and Joe Infranco from Alliance Defending Freedom, about what the decisions mean.

With the Supreme Court declaring the Defense of Marriage Act unconstitutional, the next move will likely be executive action by President Obama to equalize federal marriage benefits.

Researchers are trying to figure out if it really is possible to be addicted to food. A study of brain activity finds there's more going on in areas linked to reward and addiction after people drink a shake with lots of refined carbohydrates. But it's not clear how that factors into overeating.

A device that helps first responders communicate with speakers of other languages may soon be available to the general public. It uses a cellphone signal and gives users quick access to interpreters who can translate between English and 180 other languages.

The job of postmaster general was once one of the country's most politically powerful. But now Postmaster General Patrick Donahoe finds himself continually caught in the political crossfire. Donahoe is tangling with unions and members of Congress over how to manage the Postal Service's future.

First there was Rusty, the red panda. Now there are reports that a bear was captured in Washington, D.C., Wednesday, prompting (mostly unserious) concerns of a possible ursine siege on the nation's capital.

Justice Anthony Kennedy has now written two landmark gay rights decisions, emerging as cautious but pivotal voice in advance of same-sex marriage.

We talk to religious conservatives about their response to Wednesday's Supreme Court rulings on the Defense of Marriage Act and California's Proposition 8.

For decades, Brazilians migrated to Europe and the United States in search of better jobs and opportunities. But as Brazil's economy has grown, more and more of the world's desperate are coming to Brazil.

Researchers usually identify natural predators or parasites to combat invasive bugs like the brown marmorated stink bug and the psyllid. But after not finding immediate solutions, they are turning to pesticides and nutrient sprays.