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  1. 🧬 Microscopic animals that haven't needed a male in 25 million years -- and just got revived after 24,000 years frozen solid.

    Bdelloid rotifers are tiny freshwater creatures (smaller than a grain of sand) that have reproduced exclusively through parthenogenesis -- cloning themselves without males -- for over 25 million years. Fossil evidence confirms they've been asexual this entire time.

    When their habitat dries up, they enter a state called anhydrobiosis: their bodies completely desiccate into a dormant speck. They can stay that way for decades -- or, as scientists discovered in 2021, for 24,000 years locked in Siberian permafrost. When thawed, they resumed swimming and eating as if nothing happened.

    The same DNA-repair machinery that lets them survive complete desiccation also makes them extraordinarily resistant to ionizing radiation. They can stitch back broken DNA strands with remarkable efficiency.

    en.wikipedia.org/wiki/Bdelloid

    #Science #Biology #MicroscopicLife