How Did the Dinosaurs Die and Will It Affect Humans in the Future

2142 WordsSep 15, 20109 Pages
Four and a half billion years ago, the debris and dust left from the formation of the sun coalesced to form our home planet. 3.5 billion years ago, the first living organisms appeared on Earth. About 230 million years ago, Dinosaurs diverged from their Archosaurs ancestors during the middle to late Triassic period. For 160 million years they have dominated our planet. They are dubbed the most successful species to have lived on Earth. However, 65 million years ago, the most recent mass extinction seemed to have caused all of them to die-off. What caused the demise of the dinosaurs and 60% of life on Earth at the time? How did it affect life on Earth afterwards? Are all of the Dinosaurs dead? Will this happen to humans in the near future?…show more content…
None was found. Luis Alvarez was a Nobel Prize-winning physicist, inventor and pioneer in the field of radiation and nuclear research. He and his son, noted geologist Walter Alvarez, were conducting research in Italy when they discovered a centimeter-thick layer of iridium-enriched clay at the K-T boundary. Iridium is rare on earth, but more common in space. The Alvarezes published their findings in 1981, postulating that the thin layer of iridium was deposited following the impact of a large meteor, comet or asteroid with the earth. Furthermore, this bolide impact (the meteor, comet or asteroid colliding with the earth's surface) could have caused the extinction of the dinosaurs. At the time, the Alvarez theory was so farfetched from prevailing hypotheses that it was derided. Slowly, other scientists began finding iridium evidence at various places around the globe that corroborated the Alvarez theory. There was, however, no smoking gun in the form of an impact site. Then in 1991, a massive meteor crater 110 miles in diameter was discovered on the edge of the Yucatán Peninsula, extending into the Gulf of Mexico. The Chicxulub Crater, as it was dubbed, was named for a nearby village. Scientists believe the bolide that formed it was roughly 6 miles in diameter, struck the earth at 40,000 miles per hour and released 2 million times more

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