your brain is literally producing light right now and i need everyone to stop scrolling and absorb that for a second
a 2025 study put 20 people in a completely dark room with devices sensitive enough to detect a single photon, aimed them at their skulls, and confirmed that the human brain emits real measurable light that passes right through bone. they're calling the technique photoencephalography which is basically an EEG but for light instead of electricity, and honestly the name alone sounds like it belongs in a sci-fi novel.
but here's where it gets actually wild. the light patterns changed depending on what the person was thinking about. eyes open produced a different glow than eyes closed, listening to sounds lit up the temporal lobe differently than silence did, and the relationship between electrical brain activity and the light wasn't even a simple one-to-one thing. your brain apparently has this whole secondary communication layer happening in photons that we've just been completely blind to until now.
the light comes from your mitochondria, those little cellular power plants that use 20% of your entire body's energy just to keep your brain running. the chemical reactions that produce all that energy throw off tiny bursts of light as a byproduct, and some researchers think it might not even be waste, it might actually be how neurons talk to each other through something like biological fiber optics.
your skull is literally a lantern and nobody told you.
