Humans

Ten years after the storm some residents have found healing — in the arts, family and new opportunities. Others suffer lingering grief and other difficulties they trace to Katrina.

Popular advice suggests a low-carb diet is necessary to trigger the body to shed fat. But a small, rigorous study finds low-fat diets also spark body-fat loss. The key: Choose a diet you'll stick to.

Most studies of music's ability to ease pain have been small. But an analysis pooling the best research builds a strong case, doctors say, that a dose of music reduces the need for painkilling pills.

Octopuses are cool. They can regrow lost arms, change the color of their skin, and are surprisingly smart. Scientists who sequenced the first octopus genome say it's nearly as big as a person's.

Tigers have round pupils, but domestic cats have vertical slits in the center of their eyes. What gives? A census of the shapes of animals' pupils suggests size and way of life each play a big role.

Giving away something that could make you a billion dollars sounds foolish. But Dr. Jay Bradner believes it's essential to share even the most prized scientific discoveries if we hope to cure cancer.