Freezing temperatures caused by blocked-off sunlight wiped out dinosaurs: new study says

Freezing temperatures caused by blocked-off sunlight wiped out dinosaurs: new study says

A new study has challenged the long-believed theory that dinosaurs became extinct millions of years ago after an asteroid caused a worldwide firestorm.

According to a team of researchers from the University of Edinburgh, University of Exeter and Imperial College London, freezing temperatures caused by blocked-off sunlight wiped out dinosaurs.

The researchers reached the conclusion after recreating the huge amount of energy that would have been released by the suspected asteroid collision. Using computer modeling during the experiment, they concluded that an asteroid collision's impact would not have been large enough to set all vegetation on fire on a worldwide scale.

At the site of asteroid's impact in Mexico, the heat pulse would have been up to 500 degrees Celsius. But that would not have lasted for more than a minute, which is too small time to ignite plant material.

Dr. Claire Belcher, of the Earth System Science group in Geography at the University of Exeter, said "We found that the living plant material that would have been close to the impact site did not ignite. If there were any firestorms, they were likely to have been localized rather than global."

However, Dr. Belcher made it clear that they didn't say that an asteroid didn't cause the giant reptile's extinction; rather they say that it probably didn't cause firestorms at a global scale.

The global firestorms in question have previously been considered to be the cause of the mass extinction of life on the planet around 65 million years ago.

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