> More or less, how often is “occasionally”? Cosmic ray fluxes vary depending on the energy of the photon you're talking about, but the number of events is, on

> More or less, how often is “occasionally”? Cosmic ray fluxes vary depending on the energy of the photon you're talking about, but the number of events is, on a human scale, surprisingly large. > Can this be used as a source of randomness, like for example time as a Poisson? Yes. Although from an electronics point of view, lower energy photons are _much_ easier to deal with. That's how random.org started -- https://www.random.org/history/ https://www.random.org/history/