Tardigrades glow blue to protect selves from UV light

A species of tardigrade shields itself from UV light using a glowing blue pigment, researchers have discovered.

Eswarappa found that like many other tardigrades, these Paramacrobiotus are resistant to ultraviolet radiation. After sitting under a germicidal UV lamp for 15 minutes — ample time to kill most microbes and give humans a skin lesion — all Paramacrobiotus specimens survived, seemingly unfazed by the ordeal.

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