Richtersius coronifer in active and 'tun' states.A↔P = anterior-posterior; mg = midgut; go = gonad;pb = pharyngeal bulb; mo = mouth; st = styletScale bars = 100 μm

The animal that stops life—without dying.

When water vanishes, tardigrades retract and form a cryptobiotictun’ with almost no metabolic activity. In this state, they endure several years without food or water.

Tardigrades’ Pause Button: The Cryptobiotic Tun

Artistic rendering of a DNA strand with particle effects against a dark background.

Glass-like armor inside.

They make intrinsically disordered proteins that can form a glass-like matrix and shield membranes. Dsup binds nucleosomes to protect DNA from hydroxyl radicals and boosts repair under ultraviolet-C.

Tardigrades’ Pause Button: The Cryptobiotic Tun