Part 1 of a discussion between astronomers about the video Habitable Zone: Goldilocks Paradox. How can an exoplanet be at the right temperature but still not have liquid water? If we want to find an exoplanet that could host life like us, why does it matter what that planet is made of? Find out more about the science behind the search for a habitable exoplanet in the episode The Habitable Zone: Goldilocks Paradox.

Where do stars come from? A science expert (Jerrika Hinton) explains by hooking her hapless assistant (Wil Wheaton) up to a Thought Visualizer, a machine that allows anyone to see his thoughts. With Ed Wasser.

Why do some stars end their lives in a supernova explosion? And how does that lead to forming planets and life like us? A science expert (Jerrika Hinton) explains by hooking her hapless assistant (Wil Wheaton) up to a Thought Visualizer, a machine that allows anyone to see his thoughts. With Ed Wasser.

Are microwaves really just a form of light? What exactly is the electromagnetic spectrum? While our eyes can't see most of this spectrum, except for visible light, we have developed technologies such as giant radio dishes, infrared cameras, x-ray scanners, and ultraviolet satellites to peak into the "invisible" world around us.