Environment

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.

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?