Lecture no. 36 from the course: Understanding the Universe: An Introduction to Astronomy, 2nd Edition
Taught by Professor Alex Filippenko | 31 min | Categories: The Great Courses Plus Online Science Course
Comets and asteroids have struck Earth throughout its history. One such collision 65 million years ago probably caused the extinction of the dinosaurs. Astronomers now search for asteroids that could be a potential threat to Earth.