The Hubble Space Telescope is one of the most famous scientific instruments that has ever existed. It’s given the world an unfathomable amount of data and allowed for never-before-imagined exploration of the universe we call home. Because thanks to a tiny machining error, the Hubble was almost completely dead on arrival. Two years after the telescope went up, we sent experts up after it to install a revolutionary upgrade, and got all the images we know and love today. See the full episode and learn more about how Hubble was saved from the brink of death in the video below.