Bdelloid rotifers are multicellular animals so small that you need a microscope to see them. Despite their size, they are known for their tenacity and can survive in dry, frozen, hungry, and low-oxygen environments. The paper, published June 7, 2021, in the journal Current Biology, shows that not only can they withstand the ice, but they can survive at least 24,000 years in Siberia’s permafrost. The researchers say the paper is the strongest evidence yet that multicellular animals can withstand…
