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A TED-Ed animation voiced by University of Hawaii Physics prof Veronica Bindi who explains how cosmic rays may help us understand the Universe. To wit:

We only know 4% of what the universe is made up of. Can we also know what lies beyond our galaxy … and if there are undiscovered forms of matter? Luckily, we have space messengers — cosmic rays — that bring us physical data from parts of the cosmos beyond our reach.

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