Will we be able to avoid a repeat of the Tunguska event? Or perhaps even the Cretaceous–Paleogene extinction event?

Although massive asteroid impacts on Earth are rare, astronomers have identified thousands of asteroids close enough to Earth to be potentially hazardous. Learn from meteorite specialist Denton Ebel, Curator in the Division of Physical Sciences, how scientists have proposed to deflect an asteroid that’s on a collision course with Earth.