Does Our Universe Have a Bruise?

Can a universe even get a bruise?

Scientists have been mapping Cosmic Microwave Background radiation (CMB) temperature over time and they've discovered something...unusual. CMB light is the oldest light in the universe because it's the leftover light from the Big Bang. Although it is present all around us, it's in the microwave spectrum so we can't see it. But, we can use tools to map its temperature. Which is usually very even, except for one cold spot. There are a lot of hypotheses as to why it exists but no one knows which one, if any, is correct. One theory speculates it's a "bruise" leftover from when our universe bumped into another universe.

​Watch the video below to find out more.