Desperate youth

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Electrons, neutrons and little alpha particles can actually travel faster through [the air] than light can, and that’s what causes the blue glow. […] Astronauts have experienced it, too. And there’s some speculation that, when this is seen outside of a watery environment, it’s actually occurring in the water in your eyeball.

Ron Pevey sull’alone bluastro osservato in alcune reazioni nucleari, dovuto forse all’emissione di radiazione Čerenkov (via Boing Boing, “The Blue Flash: Nuclear Accidents and the Origins of Superhero Origins”).

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