Did you know you've been cooking your food with light? Most of us have a microwave oven in our kitchens, and that's exactly what they do. When you press start, a device called a magnetron emits a ...

When your Peeps have gone stale, it's time to donate their marshmallow bodies to science — specifically, for measuring the speed of light. From time to time, NPR's science desk creates videos that ...

In the week after Easter, we had a lot of old Peeps lying around. No one seemed that interested in eating them, so we used them to measure the speed of light. For centuries the speed of light was an ...