Alien weather can get intense. On Neptune and Uranus, for example, the skies rain literal diamonds. Gravitational forces on these ice giants can become so strong, they pressurize carbon into solid crystals — a carbon crystal being, technically, what diamond is — which then rain down towards the core of the planet.
Diamond rain might seem like an exotic weather phenomenon, but new research suggests it's far more common in the universe than we might think. Indeed, exoplanets, or alien worlds outside our solar system, may be literally swimming with diamonds.
