It has eight legs, a face like a vacuum-cleaner hose, and the ability to shut its own metabolism down to 0.01% and simply wait out the apocalypse. Tardigrades have survived the vacuum of space, doses of radiation that would liquefy you, and temperatures near absolute zero — and thousands of them may be lying dormant on the Moon right now.
Journey to the Microcosmos films real tardigrades under the microscope and gently corrects the myths — they're astonishingly tough, but the 'indestructible' legend needs an asterisk.
A crisp TED-Ed primer on cryptobiosis — how an animal survives decades without water by essentially becoming a glassy, lifeless speck and then coming back.
1,500 known species, found from Himalayan peaks to the deep-sea floor, surviving −272°C to +149°C. The full biological picture of the 'water bear.'
How the machinery actually works: CAHS proteins that vitrify into protective glass, betalain pigments that mop up free radicals, and the strange chemistry of coming back from death.
The peer-reviewed discovery of 'damage suppressor' — a tardigrade protein that wraps around DNA and blocks hydroxyl radicals. Spliced into human cells, it makes them radiation-resistant too.
In 2007 scientists exposed live tardigrades to the raw vacuum and radiation of low Earth orbit. Many came back and laid viable eggs — a first in the history of life.
When Israel's Beresheet lander crashed in 2019, it was carrying dehydrated tardigrades in a 'lunar library.' They can't revive without water — but they may still be up there, intact and waiting.