You may have heard of something called the Big Bang, where all the stuff in the universe spread out from a single point. Did you know that the Big Bang is still happening? Well, it is, and you’re in the middle of it! This episode is about the universe, what it looks like, and how it is changing. Also, dark energy, the mysterious thing that makes up the majority of the stuff in our universe, and several possibilities for how the universe might end: The Big Crunch, The Big Freeze, and The Big Rip.