MELISSA BLOCK, HOST:
From NPR news this is ALL THINGS CONSIDERED. I'm Melissa Block.
ROBERT SIEGEL, HOST:
And I'm Robert Siegel. Hear a laugh, you know someone's happy. Hear a sob, you know someone is sad. Or are they? It's been thought that no matter where you live in the world, people express emotions using the same repertoire of sounds. But NPR's social science correspondent, Shankar Vedantam, reports on new research on how emotions are expressed and understood around the globe.