Does the universe go on forever? Or does it have an edge? Jack and Kate have a few ideas about how to find out, involving a GoPro and a rocket. We ask astrophysicist Katie Mack if the universe is infinite and if a robot explorer will ever send us a selfie from the very edge of its expansion. Her answer will boggle your mind. EDUCATION RESOURCES: NGSS Standards: ESS Subscribe on iTunes, and leave us a review. And read on to find out more about Katie and her answer! Dr Katheri

EDUCATION RESOURCES: NGSS Standards: ESS 5-ESS1-1 Dark Energy. The name sounds like something out of science fiction, and so does the description: A mysterious force that's pulling the universe apart. It was discovered in 1998 by two separate teams of astronomers who were competing to solve a simpler problem. They wanted to know the rate at which gravity is slowing down the universe's expansion. But what they found surprised everyone. The universe's expansion is not slowing d