"Asteroids come in all shapes and sizes--and hit our planet in them, too. But what happens if a catastrophically large one approaches earth? By looking on the ground at historical asteroid craters and present-day falls, and up into space for the big ones yet to come, a wide variety of scientists are trying to figure out how to track asteroids--and how to avoid devastating impacts in the future."--

Lexile : 1070.

An asteroid strikes -- Clues on the ground -- Blast from the past -- The death of the dinos -- Asteroid hunt! -- The search from space -- How to stop an asteroid from smashing into Earth -- What you can do! -- Learn more about asteroids and meteorites.