NPR's Short Wave team talks about the surprising benefits of small talk, more humane ways to kill lobsters, and an ancient flood that may have helped create the Grand Canyon.

NPR's science podcast Short Wave brings us stories on food fortification, why some people don't seem to get the flu, and a study on how much vigorous exercise you really need. It's time now for our ...

NPR's science podcast Short Wave brings us stories on food fortification, why some people don't seem to get the flu, and a study on how much vigorous exercise you really need.

It's ALL THINGS CONSIDERED from NPR News. I'm Scott Detrow. MARY LOUISE KELLY, HOST: And I'm Mary Louise Kelly, and it is time now for our science news round up from Short Wave, NPR's science podcast.