What did scientists revive that had been frozen in permafrost for nearly 50,000 years? – answered

What did scientists revive that had been frozen in permafrost for nearly 50,000 years?

The options that are given for this Bing homepage quiz are listed below:

A: Woolly mammoth DNA
B: A virus
C: A mosquito

The correct answer is A virus.

See The Reason for That answer below:

A virus that had been frozen in permafrost for almost 48,500 years has been revived by scientists, who warn that warmer temperatures in the Arctic, due to climate change, are potentially releasing ancient viruses that could pose a threat to human and animal health. While permafrost covers 20% of the Northern Hemisphere and has preserved the remains of extinct animals, such as woolly rhinos and cave lion cubs, it is now being weakened by warming temperatures, potentially releasing viruses that have remained dormant for thousands of years.

Chemical and radioactive waste from the Cold War era is also at risk of being released. Jean-Michel Claverie, an Emeritus professor of medicine and genomics in Marseille, has discovered several strains of ancient virus from permafrost samples taken across Siberia, including some that still infect single-celled amoebas. Claverie believes that, if these ancient viruses can still infect amoebas, there is a serious public health threat, as they could infect their own hosts.

Other viruses and bacteria that can infect humans have been found preserved in permafrost, including the genetic signatures of the virus that caused the 1918 flu pandemic and the virus that causes smallpox. In 2016, an anthrax outbreak in Siberia was linked to the thawing of permafrost during exceptionally hot summers.

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What did scientists revive that had been frozen in permafrost for nearly 50,000 years? - answered