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During the COVID-19 pandemic, one measurement became more important than almost any other: blood oxygen saturation. It was the one concrete number that doctors could use to judge how severe a case of COVID-19 was and know whether to admit people into the hospital and provide them with supplemental oxygen. But pulse oximeters, the device most commonly used to measure blood oxygen levels, don't work as well for patients of color. Kimani Toussaint, a physicist at Brown University, is leading a group trying to make a better, more equitable alternative a reality.

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While fictional monsters and superheroes consume rads like video game power-ups, radiation is a trickier matter in reality -- from everyday radiation to the destructive exposure associated with nuclear accidents and nuclear war. In this episode of the Stuff to Blow Your Mind podcast, Robert and Joe explore the nature of radiation, its effects on living tissue and the curious world of radiotrophic fungi.

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