What do you get when you combine a microwave and a pan full of those pastel colored marshmallows known as peeps? NPR’s science reporter, Adam Cole demonstrates in this segment the squishy mess can actually help you calculate the speed of light.

In this episode of SciTech Now, NPR’S Science reporter, Adam Cole demonstrates how to find the speed of light with peeps; Adam Cole joins Hari for a conversation on the  speed of light; How is climate change impacting the water cycle?; and a St. Louis lab is engineering a bomb-sniffing locust.