Asteroid impacts have shaped the course of life on Earth and are an ongoing process in today's solar system. NASA has tasked the UA's Catalina Sky Survey (CSS) with detecting and tracking near-Earth asteroids, and CSS has found more potentially hazardous asteroids from Mt. Lemmon than any other survey program in the world. Find out how asteroids are discovered, how frequently asteroids impact the Earth, and what we can do to predict and even prevent future asteroid impacts. This is the third of the five-part Summerhaven Speaker Series, presented by UA Science-Mt. Lemmon SkyCenter, July-November 2018, at the Chuck Bowden Mount Lemmon Community Center (also known as Summerhaven Community Center). The talks are free and open to the public and take place on the last Thursday of every month, July-November 2018.