New research has shown that supernovae in space can be responsible for the depletion of the earth's atmosphere, which can lead to mass extinctions.
Scientists have discovered by studying this phenomenon over millions of years, whether a star dies By a supernova, which is close enough to the earth, the planet's ozone can be broken down.
The astrophysicist Brian Thomas of Washburn University in Kansas said, "We're interested in how exploding stars affect life on Earth. Millions of years ago, there were changes in the things that lived then."
"It could have been associated with this supernova. "
By observing supernovae that occurred about 2.5 to 8 million years ago, distance of about 50 parsecs (more than 1
He found that instead of causing a sudden apocalyptic scenario, the constant flow of solar supernova particles over hundreds or thousands of years may eventually exhaust the earth's atmosphere.
That could do more penetrate cosmic radiation to the surface, which would ultimately lead to a slight DNA damage to various life forms.
Mr. Thomas said there is fossil evidence that this happened about 2.5 million years ago.
He said, "There were changes, especially in Africa, that went from forested to more grassland."
Mr. Thomas adds that life on Earth suggests being influenced by relatively close supernovae, but the increased levels of radiation could take thousands of years to take effect.
He said, "There is a more subtle shift, and instead of" erasing everything, "some organisms are better off and others are worse off."