Scientists dispute the theory of the death of the dinosaurs

04.03.2004

04.03.2004


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According to new data, the asteroid collision with Earth in the Yucatan Peninsula in Mexico, which is called the cause of extinction of the dinosaurs, was long before the death of the giant animals and can not be the sole reason for the disappearance of representatives of prehistoric fauna.

The researchers, who published their findings in the journal "Prosidings" of the National Academy of Sciences of the United States, support the alternative theory that the death of the dinosaurs and other life forms are the result of a series of disasters that changed the Earth's climate.

Most scientists believe that an asteroid fell to Earth in modern-day Mexico 65 million years ago, and that this event was the final era of the reign of the dinosaurs.

However, some are opposed to this theory, saying that the huge volcanic eruptions with global warming, and a series of asteroid with the Earth led to the death of the dinosaurs and most other life forms on the planet.

Now Professor Gerta Keller of Princeton University says that she finally managed to refute the idea that dinosaurs killed a single asteroid.

"For twenty years as a proven fact saying that an asteroid collision with the Earth at the turn of the Tertiary and Cretaceous caused the death of the dinosaurs. Now, however, we argue that we have very strong evidence that it was not so, and the script of those events was much more difficult, "- said Professor Keller.

A controversial hypothesis

Evidence of analysis served as the rocks taken in the central part of the crater formed as a result of the collision on the Yucatan Peninsula.

The first studies of rock samples, conducted by a team of Professor Keller said that the collision occurred over 300,000 years before the extinction of the dinosaurs.

And, most of all, this disaster was the latest episode in a chain of events that led to a warming of the Earth and the destruction of many species of flora and fauna of that period.

However, not everyone agrees with this hypothesis. Another team intends to publish the results of studies of rock samples Yucatan crater, which are contrary to the conclusions of the team Hertha Keller.

The question of what killed the dinosaurs, has been widely discussed in the last 10 years — and most likely will end the debate is not soon.

Battery News, 02.03.2004 10:11
Source: BBC

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