This electron microscope image provided by researchers in March 2014 shows a section of a Pithovirus particle, dark outline, inside an infected Acanthamoeba castellanii cell. The length of the ... more 
This electron microscope image provided by researchers in March 2014 shows a section of a Pithovirus particle, dark outline, inside an infected Acanthamoeba castellanii cell. The length of the particle is about 1.5 microns with a 0.5 micron diameter. Researchers have revived the virus, which is more than 30,000 years old, after finding it in the permafrost of northeast Siberia. While it poses no threat to people, its recovery suggests that dangerous germs might emerge in the future as permafrost thaws because of global warming or mineral exploration, researchers suggested Monday, March 3, 2014 in the Proceedings of the National Academy of Sciences. (AP Photo/IGS, CNRS-AMU, Julia Bartoli, Chantal Abergel) less 
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Associated Press | Photo By IGS, CNRS-AMU, Julia Bartoli, Chantal Abergel
Tue, Mar 4, 2014 11:27 AM EST