Palaeontologis around the world can finally end the debate over the last 30 years around the theory that led to the extinction of dinosaurs from the face of the Earth.
So far, there are two theories for how the dinosaurs. The first theory, dinosaurs gradually became extinct long before the blow of the giant rock on the planet about 65 million years ago. The cause is global warming and rising sea levels.
The second theory says, the meteor that crashed in the Yucatan Peninsula in Mexico's southeastern region that triggered the mass extinction. This leads to a giant meteor fire, sending debris and dust into the sky blocking the sun for hundreds of millions of years.
As a result of a blow-sized meteor about 15 kilometers wide, it appears the hole as wide as about 200 kilometers. Sand, dust and other material ejected into space and then falls spread over the earth's surface and produce a layer called the KT boundary (boundary layer that marked the Cretaceous and the Tertiary era).
A piece of dinosaur horn can answer the debate over whether dinosaurs were land is still there when the asteroid hit Earth 65 million years ago. Horn measures 45 inches, likely belonged to a Triceratops was found in the Hell Creek, Montana, United States.
The inventor is Tyler Lyson, lead researcher from Yale University. He mentioned that the specimen found was only 13 centimeters below the layer of material caused by a meteor. "This makes it the youngest dinosaur fossil ever found," said Lyson, as quoted from the ABC, July 13, 2011.
Lyson said, because the horn was found in the mudstone, the possibility that the distance between the age of fossils can be at odds with the asteroid impact just one year alone. "These fossils show that the non-avian dinosaurs or dinosaur land at least still alive when the meteor hit the Earth," Lyson said.
Lyson realized that his research does not completely deny the process of gradual extinction. However, he believes that the findings refute a theory which states that the first dinosaurs became extinct before hujaman asteroids.
As is known, the theory about the extinction of dinosaurs due to be introduced 30 years ago. Since then, a debate ensued over whether dinosaurs were extinct before the collision occurred onshore. Recent findings published in the journal itself from the Royal Society Biology Letters.
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