Superpowered bears that won't maul you

Hey, want to meet a creature that you can't destroy by dehydrating, boiling, freezing (we're talking absolute zero here), and bombarding with radiation? Obnoxious Great Aunt Mabel's evil chihuahua is a good guess, but I was thinking of the teeny water bears, the lesser known cousins of the ol' science lab favorite, the fruit flies (also called the girly-man flies).

Sure you can squash them when they're squiggling about, but once they enter the tun (deep hibernation) state, good luck with your blow torch.

NPR radio has a short clip you can watch.