Learn the Surprising Reason Why the Sky Goes Dark at Night [VIDEO]

The sky is dark at night. That's something we take for granted with no questions asked. But why is the sky dark at night? Hint: It's not because the sun is down. In a really simple and fun video, Henry Reich, a researcher at the Perimeter Institute in Canada, explains why the light in the sky fades at night. We don't want to spoil it for you, but it involves the ever-expanding universe and physics. But worry not, you don't need to be a science genius to understand the concept. The video is part ...