The Ancient Snows of Mars

When she was learning to forecast the weather in Hawaii, Brown University grad student Kat Scanlon didn’t suspect it would help her uncover evidence for rain or, more likely, snow that helped shape the surface of Mars billions of years ago. Learn more about your ad choices. Visit megaphone.fm/adchoices See omnystudio.com/listener for privacy information. See omnystudio.com/listener for privacy information.