[ExpertScie]

With the process of ice melts, ancient bacteria and viruses are coming back to life after millions of years. Ice melting is due to global warming. This process of growth of bacteria and viruses after almost 7-8 million years is natural and there is nothing to worry. Also such bugs are unlikely to cause diseases in humans.

This is because; they are successful in surviving but many had loosed virulence and other factors during the course of evolution. Many researchers had extracted DNA and Bacteria from ice found beneath the surface of a glacier in Mullin and Beacon Valleys of Antarctica. These samples were estimated to be 5-8 million years old. These samples when grown along with control sample that is the young cells, it was found that the organism from old ice doubled in size every 7-10 days on average while the control grew really fast.

The examination of length of DNA fragments which were found in ice samples determined that frozen Deoxyribose Nucleic Acid is degraded gradient with time. The half life is 1.1 million years it means that after 1.1 million years half the original DNA degraded. Further studies suggested that DNA degradation was due to cosmic rays, which are stronger at the poles. Also the earth’s magnetic field is weakest at the pole and contributed to it.

Many such examples had proved that Bacteria might have got trapped in the salt crystals which were down 1850 feet under various sea and land. And today we are able to trace back to that time due to fossil remains. This was the time when first dinosaurs were just starting to appear on Earth. It means that Microorganisms had been there during that time and few of them can still be made alive if they start to germinate out of spores !