NPR's Hannah Chinn and Emily Kwong talk about the microbes behind great-tasting chocolate, possible reasons for daytime drowsiness, and a curious observation about the poop of seabirds.

What's behind the trend of so-called "gray divorces," and what is it like for newly single people to seek out new relationships over the age of 50?

Mortgage rates are finally dropping a bit lower at the end of a slow summer season. We take a look at what the latest data tells us about what's ahead.

Climate change increased the severity of Hurricane Katrina 20 years ago. Since the scientific understanding of how climate change influences hurricanes has changed and improved.

NPR's Mary Louise Kelly speaks to singer and songwriter Kathleen Edwards about her new album, Billionaire.