Space

"The danger of asteroid or comet impact is one of the best reasons for getting into space...I'm very fond of quoting my friend Larry Niven: 'The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll serve us right!'"
--Arthur C. Clarke,
"Meeting of the Minds : Buzz Aldrin Visits Arthur C. Clarke" by Andrew Chaikin (February 27, 2001)