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

Shot at 900 m/s. Still alive.

Tardigrades can survive impacts up to 900 m/s and momentary shock pressures around 1.14 GPa GPa.

Tardigrades: Tough, Not Invincible

Breathtaking view of icebergs in Tiniteqilaaq, Greenland's fjord, under a clear blue sky.

Seasonal armor.

Halobiotus crispae switches to a winter pseudosimplex that resists freezing and low salinity, staying active while reproduction pauses until summer.

Tardigrades: Tough, Not Invincible

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