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College of Arts and Sciences, Liberal Arts at Cornell University

Study Reveals How 'World's Toughest Bacterium' Survives Lethal Radiation

Listed in the Guinness Book of World Records as "the world's toughest bacterium," Deinococcus radiodurans can withstand extreme temperatures and drought conditions, lack of nutrients and a thousand times more radiation than a human being.

A new study by Cornell researchers reveals that nitric oxide -- a gas molecule used in many metabolic processes in animals and a pollutant in the atmosphere that leads to smog -- plays a key role in D. radiodurans' recovery when exposed to ultraviolet radiation (UV). Full Story