Space scientists are acutely aware of what can happen when climates change in other parts of our solar system. Take Venus, where it rains sulfuric acid and is 900°F on the surface, but it wasn’t always that way. Astrophysicist Michelle Thaller talks with a NASA expert on Venus about how it became a hellscape. And she talks with the Library of Congress’ inaugural chair of astrobiology about how to grasp this new geologic era where humans cause rapid change.