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How IceCube detects elusive cosmic neutrinos
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How IceCube detects elusive cosmic neutrinos

Here’s the fascinating thing: neutrinos pass through Earth almost without interacting, yet they can carry clues about some of the universe’s most energetic places. At the South Pole, IceCube uses 5,160 optical sensors buried in a cubic kilometer of clear ice to spot faint light from particles produced when neutrinos interact with ice. Researcher Juan Carlos Díaz Vélez explains how the observatory has traced high-energy neutrinos to cosmic sources, including a blazar powered by a supermassive black hole. His team’s work continues under Nobel laureate Francis Halzen, turning deep Antarctic ice into a remarkable window on the universe.
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