Worms Frozen for 42,000 Years in Siberian Permafrost Wriggle to Life


Did you ever wake up from a long nap feeling a little disoriented, not quite knowing where you were? Now, imagine getting a wake-up call after being "asleep" for 42,000 years. In Siberia, melting permafrost is releasing nematodes — microscopic worms that live in soil — that have been suspended in a deep freeze since the Pleistocene. Despite being frozen for tens of thousands of years, two species of these worms were successfully revived, scientists recently reported in a new study.


Their findings, published in the May 2018 issue of the journal Doklady Biological Sciences, represent the first evidence of multicellular organisms returning to life after a long-term slumber in Arctic permafrost, the researchers wrote.

Though nematodes are tiny — typically measuring about 1 millimeter in length — they are known to possess impressive abilities. Some are found living 0.8 miles (1.3 kilometers) below Earth's surface, deeper than any other multicellular animal. Certain worms that live on an island in the Indian Ocean can develop one of five different mouths, depending on what type of food is available. Others are adapted to thrive inside slug intestines and travel on slimy highways of slug poop.


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