Dan Zafra captured a timelapse of something he could only dream of – red sprites, also known as red lightning, flashing above the Milky Way – while photographing from the Clay Cliffs in New Zealand’s south island on 11 October. Red sprites are brief, large-scale electrical discharges that occur high above thunderstorms, reaching altitudes of up to 90km. They are almost impossible to see with the naked eye and last just a few milliseconds