State of the World from NPR cover image

Will the 'Iron Curtain' fall again? Remembering Putin's charm offensive in Texas

State of the World from NPR

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Er High Purity Germanium Detectors

Muller works with the norwegian radiation safety authority. Muller takes us outside, across a snowy field to see his machines. These are called er high purity germanium detectors. And these can detect very, very small, trace level amounts of radioactive particles.

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