Talk of the Nation

A growing field of medical research aims to pinpoint exactly why pets can make us happier and healthier. Some studies show that animal interaction can increase a person's level of oxytocin, a hormone associated with love and trust. And the animals also benefit from positive human interaction.

Syndicated radio host Rush Limbaugh called a Georgetown student a "prostitute" and a "slut" after she testified before a Senate committee and called for federal health care coverage to include the cost of contraception. Limbaugh apologized, but it has prompted a re-examination of the term, "slut."

President Obama recently said, "Iran's leaders should understand that I do not have a policy of containment; I have a policy to prevent Iran from obtaining a nuclear weapon." Some say containment represents a viable option against Iran, but others argue that Cold War strategies do not apply to Iran.

Adult children caring for elderly parents may feel guilty, isolated and resentful. But some parents being cared for do too. Dr. Lillian Rubin knows that struggle well, as she has found herself at odds with her well-meaning daughter over what her daughter wants for her, and what she actually needs.

The human brain craves predictability, according to neuroscientists, and when politicians appear to flip-flop, our brains don't like it. Often, we feel betrayed. NPR science correspondents Jon Hamilton, Alix Spiegel and Shankar Vedantam talk about why we're hard-wired to appreciate consistency.