Impact!

Description:

"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."--

subjects: Juvenile literature,  Asteroids,  Collisions with Earth,  Extinction (Biology),  Meteorites,  Meteorites, juvenile literature,  Extinction (biology)