https://www.livescience.com/55484-swift-tuttle-collision-with-earth.html
What Would Happen If Comet Swift-Tuttle Hit the Earth? | Live Science
Jul 21, 2016 - Here's what could happen if Comet Swift-Tuttle collided with Earth. (It won't happen in our lifetimes, but there is a tiny chance that it may happen someday).
what would happencomet swift tuttle