Mr. Snuffleupagus reads and reacts to mind-blowing facts about the universe. You can catch Snuffy and all his friends in the new season of Sesame Street on HBO or everyday on HBO Family or PBS Kids.

Astronomers estimate the number of galaxies in the universe by counting galaxies in detailed images of small sections of the sky and extrapolating to the entire sky, resulting in an estimated 2 ...

Albert Einstein stands next to Catholic priest Georges Lemaître in a black and white photo from 1900 In 1915, Albert Einstein published his theory of general relativity, which originally stated that ...

From the Catholic priest who pioneered it, to how we can (almost) see it, here are 5 fascinating facts about the Big Bang. When you purchase through links on our site, we may earn an affiliate ...