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I think you would enjoy my geology class this morning. Don't bet on it. I never care much about rocks. But you do care about dinosaurs I recall and today we discuss the geological evidence about what may kill off the dinosaurs at least here in North America. Oh, sure. They got hit by a comet or something. I think. Well, Yeah, about 60 million years ago, a huge comet did crash into earth down in Mexico and it plowed out as an enormous crater over a hundred miles across. And that’s what why death the dinosaurs, right? Well, it wasn’t exactly the impact itself but what happed right afterward. You see researchers figured out from the shape of the crater that the comet must be coming in pretty low across the Atlantic and so right after the impact a huge cloud of fire river must swept clear across the north America, all in just a few minutes. And that what probably kill off not just the dinosaurs but a lot of different species of plants and animals. Amazing! Yeah! And even 2000 miles in the impact, plants would be burst in the flame. And the fire that intense must destroy just about everything! Well, above ground anyway. Above ground? Say! I wonder it better explains that why the dinosaurs all disappeared but some other animals, like maybe small mammals, living underground managed to survive. Make sense. Anyhow latter on the tons of dusts that thrown away out into the atmosphere may have caused some globe climate change. So eventually the comet probably affected plants and animals species all around the world but nowhere as much as North America.