Patrick Freeman is studying elephants in Namibia when he receives terrible news.

To discover why some survivors of trauma experience PTSD and some don't, scientist Rachel Yehuda must convince a community of Holocaust survivors to let her study them.

As a young science reporter at NPR, Science Friday's Ira Flatow accepts a challenge to record what it sounds like to go over Niagara Falls.

While completing a community service requirement in high school, comedian Wyatt Cenac puts a drunk driving simulation to the test.

Neuroscientist Paula Croxson is determined to finish her first open-water swimming race -- despite the dangers.