The Tiny Animal That Survives the Vacuum of Space

They are half a millimeter long, look like a chubby eight-legged gummy bear, and live in the moss on your roof. They can also be boiled, frozen to near absolute zero, blasted with radiation, dried out for decades, and shot into the naked vacuum of space — and simply wake back up. This is the toughest animal that has ever existed, and almost nobody has heard of it.

by rbtholeJul 18, 2026
  1. Tardigrades: Chubby, Misunderstood, & Not Immortal

    The myth-busting introduction: what water bears can really survive, what they can't, and why 'indestructible' is a slight exaggeration of an already absurd creature.

  2. Tardigrade — Wikipedia

    The full profile of the phylum first described in 1773 as the 'little water bear': 1,300+ species found from Himalayan peaks to deep-sea trenches to the mud in your gutter.

  3. Tardigrade Facts — National Geographic

    A clean overview of the anatomy and habits of an animal that can withstand pressures greater than the deepest ocean trench and temperatures from -328°F to over 300°F.

  4. Cryptobiosis: How Tardigrades Cheat Death — AskNature

    The secret weapon: cryptobiosis. When conditions turn deadly they expel nearly all their water, curl into a 'tun,' drop their metabolism to undetectable levels, and wait — for up to 30 years.

  5. Eating, Hatching, and Crashing into the Moon: More About Tardigrades

    The stranger side: how they eat, how they reproduce — and the true story of the thousands of dried tardigrades that may have been scattered across the Moon in a 2019 crash landing.

  6. Tardigrades in Space Research: Past and Future

    The peer-reviewed evidence: the 2007 TARDIS mission that exposed live tardigrades to open space for 10 days — and the ones that came home, rehydrated, and laid viable eggs.

  7. Tardigrades Just Being Tardigrades — Under the Microscope

    The payoff: no narration needed. Just gorgeous microscope footage of water bears trundling, munching and clambering through their tiny wet world.

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