A thought-provoking video about asteroids and a "doomsday asteroid" that may hit Earth in the 2020's is presented here. This program could be used as a way to start a research project about asteroids with your class.

How were we, as a planet, effected by ancient asteroid impact? We find that a cosmic impact was responsible for killing the dinosaurs, but it also led to the conditions that made human life possible. This is an informative clip that...