A large asteroid collided with the Earth 66 million years ago.  This killed 75 percent of the world's living creatures.  Smoke has been in the sky for thousands of years.  Even the light of the sun was not reaching the earth.  But, even before this incident a horrible incident had taken place.  Which wiped out all the earth's plants and marine life.  Now experts claim the incident could happen a second time.

The destruction was caused by a gap in the ozone layer

 About 360 million years ago the plants and marine life on our planet became extinct.  This was due to a gap in the ozone layer.  This information has come in a new research which has been published in a magazine called Science Advance.

 The research report states that the depletion of the ozone layer 360 million years ago led to the extinction of life, plants, marine life, etc. in underwater water.  In some places on earth there was only fire.  There was terrible heat.

This research was done when scientists found very small plants in the holes of some ancient rocks when this plant was studied.  However, some of these plants were safe but the rest were burnt to ashes.

 When scientists studied the DNA of damaged plants, they found that they had been burned or damaged by the sun's ultraviolet rays.  After which the scientists became annoyed.  This is because the ozone layer that protects us from the sun's harmful rays has once caused such a big event.

 Further studies revealed that the increase in heat due to the depletion of the ozone layer increased volcanic activity within the Earth.  Volcanoes erupted in some countries.  There was a terrible catastrophe.  After which the whole world was devastated.

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 But when the Earth's atmosphere became so hot, the Ice Age began.  Which caused life to begin again in the world.  The warming earth slowly began to cool.  Now scientists have once again explained that if such a rift in the ozone layer occurs again, this 36 million year old phenomenon could be reversed.  No one will be able to save the earth again.