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What are the major mass extinctions?
What was found in the K-T boundary that made scientists think an asteroid had hit?
What's important about the Chicxulub crater?
- publically identified in 1991 in the Yucatan Peninsula
- about 180 km wide
- nearly circular
- breccia found under the sufrace
What caused the dinosaurs to become extinct?
KT extinction event
What are NEOs?
comets and asteroids that have been pushed into orbits that allow them to enter the earth's neighborhood
What can we do if asteroids are headed our way?
- blow it up in space
- push it out of earth's orbit
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