65 mya there was a asteroid that hit earth at 32 mps. The explosion was as big as if someone lit 10 trillion tons of TNT. It also made a dust cloud that covered the whole wide world. That made a cold dark world. With out the sun the plants could not grow so the herbivores died so the carnivores fought each other then once there was one carnivore left he died because there was NO FOOD at all not a bit of flesh. The dinosaurs didn't die in a day it took thousands of years to happen you think they adapt or evolve but no it takes millions of years to happen.