Scores of colors ... like Space photo of the day: Brilliant comet shines at sunset over observatory in Chile Wispy comet photobombs 'rare' planetary parade above Chile's Atacama Desert (photos ...

What are the metal compositions of the different colors of rocks in places like the Painted Desert? The red ones have iron? The white rocks have gypsum? But what metals are in the blue ones ...

A short-lived but welcome snowfall in North America’s hottest desert was captured on camera ... stages of a La Niña climate pattern, the cool phase of the El Niño-Southern Oscillation (ENSO ...