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Episode 143: Origins Unknown

Play Jan 31•4:30

Cosmic rays consist of high-energy particles that streak through space, crashing into the Earth's atmosphere and leaving a tell-tale trail. But where do these rays come from? Experiments have turned up different results. One shows the rays originate from somewhere in the nearby universe, while another suggests the rays are left over from the Big Bang. A new experiment may help answer the questi...

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