depended upon plants for food, and then among the carnivores that ate the herbivores. Those smaller animals that could hide and hibernate until the sun came out again must have sruvived and formed the animals that there are today. There is other evidence for this theory : there is a layer of iridium found on top of the fossils which can be found all over the world. this is important becouse there is a lot of iridium on asteroids while on earth it is only deep down inside the crater. Details of the Volcano Theory: Another less popular theory to explain the disappearance of the dinosaurs suggests that a drop in the oxygen levels in the lower atmosphere led to the gradual death of all kinds of species. Robert Barner and Gary Landis of the U.S. Geological survey determined that the air that the dinosaurs consumed contained 50% more oxygen than the air today. This can be the same for us as trying to breathe to the same air found at the sea level as compared to air at 3500 m. There was a lot of volcanoe eruptions at the same time (and since they took up soo much air it was hard for the dinosaurs to breathe , so they fianlly died. The evidence is that the fossils found in the ground contain traces of lager traces of Oxygen. How can humans stop this? Since mankind is much smarter than the reptiles it is obvious that we can stop these asteroids from colliding with the earth. The only question is how. Now we have nuclear devices which can be put on these asteroids so that they can explode just in time before it's course is doomed towards earth....
