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They are not cute:
Credit: NPS/Diane Nelson
But they are resilient to almost anything, even surviving in low Earth orbit (that is, outer space!)
Here is a nice youtube video summarizing some data about the microscopic "beast" (sub-millimeter in length):
And for the space thing, the paper is fortunately open sourced:
Tardigrades survive exposure to space in low Earth orbit, Current Biology 2018, V. 18