When bright, low clouds become scarcer, Earth becomes darker and soaks up more sunlight rather than reflecting as much of it ...
The sun's rays pass through Keyhole Arch during a short period of time at Pfeiffer Beach in Big Sur, California.
Professor Alan Fitzsimmons, from Queen’s University Belfast, has recently returned from ground control of ESA’s Hera mission.
But as otherworldly as they sometimes look, snow rollers are simply a natural phenomenon that can occur in snowy and windy conditions — or rather, very specific snowy or windy conditions.