Human brains emit a bizarre glow

Subtle light shines through our skulls in patterns that depends on what we're doing

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Our brains glow. We can't see it happen with the naked eye, but scientists can measure extremely subtle light passing through the skull and a recent study has found that this light changes depending on what we're doing.

All living tissue emits a faint light called ultraweak photon emissions (UPE), and the human brain produces a significant amount of it, due to the high amount of energy it consumes.