Scientists revive ‘zombie’ virus after 50,000 years trapped in Siberian permafrost:

As our world continues to warm up, vast areas of permafrost are rapidly melting, releasing material that's been trapped for up to a million years. This includes uncountable numbers of microbes that have been lying dormant for hundreds of millennia.

To study these emerging microbes, scientists from the French National Center for Scientific Research have now revived a number of these "zombie viruses" from the Siberian permafrost, including one thought to be nearly 50,000 years old – a record age for a frozen virus returning to a state capable of infecting other organisms.

Scientists revive ‘zombie’ virus after 50,000 years trapped in Siberian permafrost