Fragile World

"'Sixty-five million years ago, one of these things took out the dinosaurs,' said Faulkes Telescope director Paul Roche, before the collision. Now, he said, 'we're going to get our own back'.",
This quote taken from the article, Comet crash clues for Europe, about the recent Deep impact experiment makes you wonder about the fragility of the world. There are so many unknowns and variables beyond our control. Who knows whether we will also meet the same fate as the dinosaurs one fateful day as evidenced by the KT boundary.