The Cretaceous Mass Extinction is also know as the "dinosaur extinction". This extinction wiped out the dinosaurs, flying and marine reptiles, and toothed birds forever. 70% of all animals died and 90% of the plants. There are several theories to this event. One is that the dinosaurs were to slow and stupid to survive. But there are several problems about this theory. One of these problems is that many scientists have shown that some dinosaurs, especially that flesh-eaters were very active, smart, and warm-blooded during their reign. Another problem is that the theory states that dinosaurs went extinct some time, 150-100 million years ago, but how do you explain 70-66 million year old fossils of the last dinosaurs. These pieces of evidence show that the "to stupid to survive" theory is a very unlikely reason for the dinosaur extinction. Another theory is the environment got to cold and cold blooded dinosaurs died out. This theory also has some evidence to disprove it. Yes the giant plant-eating dinosaurs were probably cold-blooded, died out because of the cold, and starved the meat-eaters. But by the end of the Cretaceous, there were hardly any of the giant plant-eating dinosaurs left on Earth, and how about the reptiles under the sea, even if the temperature of the water got colder, most marine reptiles living at the end of the Cretaceous were warm blooded and could have adapted to the temperature change. Yet another theory is that it got to hot, but it brings up a similar problem to the "to cold to survive" theory. If the oceans got to hot for the marine reptiles almost nothing, including our modern birds and mammal ancestors would have made it. Out far out in a cloud of comets in a deep freeze at the edge of our solar system, there exists a darker twin of the sun. It is a failed star. It never got enough mass to shine. This is Nemesis Star. As it wanders the dark void between the stars, it sucks up comets into its orbit. The Nemesis Star returns every 25 million years to the orbit of the Earth and sheds its comets on to the Earth, creating a heavy bombardment. Geological evidence shows that it aligns with dinosaur extinction and other "minor" extinctions. When the dinosaurs met the Nemesis Star they knew it was there last. But there is a problem with this theory. The Nemesis Star may not even exist. At first scientists thought that for every steadily shining star, there was 10 failed stars. Now astronomers have turned the tables and proved for every failed star there are 10 steadily shining We may never know for sure if our sun's dark twin really exists. The most likely story is that 65 million years ago, an asteroid was heading toward the Earth, fast, very, very fast. It slammed into the Earth at a 30 degree angle with the force of 100,000 H-bombs in to the Gulf of Mexico. It sent up hundreds, maybe even thousands of hot rocks and boulders, killing all animals in the impact zone. Giant fires raged up the continent of North America, incinerating anything in their path. Giant cracks opened up in the ground trapping any unlucky animals. Giant waves flooded beaches, swamps, and forests. Later in the night as the impact died down heated clouds released acid rain. Many dinosaurs survived this because of there hard scaly skin, but the trees and plants were burned up. As snow began to fall great herds of plant-eaters hopelessly searched for food, but found none and died. The meat-eating dinosaurs also fed on the plant-eating dinosaurs carcasses as long as they could, but when the food ran out they eventually killed each other in hunger. This probably lasted for a couple of months. As soon as the long, dark winter was over, a new era dawned. The world was almost the same as it was before the asteroid strike, but something was missing. The dinosaurs and flying reptiles. They could not make it through the dark and cold and eventually perished, but the dinosaurs may not really be extinct. Examination of fossils and scientific tests of dinosaur and bird DNA shows that birds are really dinosaurs! So if you want to see a dinosaur just look up in a tree
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| An asteroid slamming into the Earth is the prime theory of why the dinosaurs went extinct |
