Amazing lightning/volcano photo. I’m not a geologist, but I imagine this kind of sky to have been very common on early Earth…
“A lightning storm over the Puyehue-Cordón Caulle ( Chile) range a day after the volcano, which had lain dormant for half a century, erupted. Photograph: Francisco Negroni, AgenciaUno/AP”
(Source: plus.google.com)