Science

Adelie Penguins In Danger

A new study says the population of Adelie penguins in the Antarctic could drop dramatically in population by 2099 due to climate change. Megan Cimino, who headed the study, explains why.

'Star Trackers' Help Juno Find Its Way

Space navigation is tricky. There's no up or down, no left or right, and no road signs. This device uses stars to help determine if a spacecraft is off course. It takes nifty pictures, too.

Why Are Diamonds Worth So Much?

Someone bid $61 million for an uncut diamond this week. NPR's Scott Simon asks Rachelle Bergstein, author of "Brilliance and Fire: the Biography of Diamonds," what makes a rock worth so much money?