Asteroids can teach us a lot about the origin of our solar system—but they can also pose a potential threat if they come too close to Earth. Join Harold C. Connolly Jr. for an overview of the OSIRIS-REx and Hyabusa2 spacecraft missions that are currently probing the asteroids Bennu and Ryugu—two “potentially dangerous asteroids” whose orbits around the Sun are predicted to come within 5 million miles of Earth. This Frontiers Lecture took place in the Museum's Hayden Planetarium on December 4, 2018. Support for Hayden Planetarium Programs is provided by the Schaffner Family and the Horace W. Goldsmith Endowment Fund. Select Hayden Planetarium Programs are sponsored by JetBlue.