Science & Medicine
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From the ground breaking and life saving to the wacky and implausible, Dr Karl Kruszelnicki reveals some of the best moments in science.
June 23rd, 2015
Episode 59 of 126 episodes
We are bathed by radioactivity 24 hours a day. Dr Karl lists some of the most common - and surprising - sources.
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Welcome to the daily audio workout for your head.
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