The article provides information about Deinococcus radiodurans, a radiation-resistant bacterium. It has been noted that radiation, heat and dehydration trigger cell death by causing double-strand breaks in DNA but D. radioduran remains to be only organism that can survive in 1.5 million rads. Since DNA is the first part of a cell to be damaged by radiation, D. radioduran possesses the ability to reassemble the destroyed chromosome in just a few hours.