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Dr. GERBER: It's approximately four times the natural radiation dose that we all receive annually in the Unites States, as a result from background radiation due to radon and other materials.
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The phenomenon has been known to laboratory scientists for many years: Rats exposed to slightly higher than natural doses of radiation live longer than ones with natural exposure.
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The amount is extremely small and less than 1% of all other natural sources of radiation.
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Some other Nato countries also use munitions with DU, which has 40% less radiation than natural uranium, itself not considered a health hazard.
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This necessitates costly safeguards to mitigate the risk of a radiation release due to accidents, natural disasters, theft or terrorism.
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Grasp Lab team leader, Dr Vijay Kumar, believes such autonomous, self-learning UAVs could be used to search buildings for signs of life after natural disasters, for example, or check for chemical or radiation leaks.
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This radiation can be detected although Dyson spheres remain difficult to distinguish from natural astronomical objects that give off similar signatures.
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Radiation is all around us, from the sun and space and other natural sources.
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He says radiation emitted from nuclear power stations was less than that which occurs in our natural environment.
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Radiation is a fact of life on this planet, it is prevalent, abundant, and natural.
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