Why are tardigrades so indestructible?

Extreme cold, heat, radiation, pressure, the vacuum of space itself...you name it, tardigrades can live through it. But why are they so much more versatile than other creatures that live in extreme conditions? What's their secret, and how do they activate it?
Article - "Chemobiosis reveals tardigrade tun formation is dependent on reversible cysteine oxidation" doi.org/10.137...
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[@sarcasm6669]

Yay, my Monday Highlight has dropped🎉🎉🎉😁

[@meander112]

Your "warlock" comment has cross-polinated with my fandom of Rich Burlew's very-long running Order of the Stick D&D webcomic, where the basic elementals are solely made of one chemical element. I now want a Warlock patron that is an Oxygen elemental.