National Geographic History on Instagram: "Over millions of years, immense heat and pressure transformed ancient fossils on a prehistoric seabed into crystalline marble, creating one of India's most stunning natural wonders—the Marble Rocks of the Narmada River. #IndiaFromAbove is now streaming on @DisneyPlus and @hulu."

BLOOMING ROCK EXPERIMENT I'm growing aragonite crystals with this Blooming Rock from Cricket Mountain, Utah! This limestone mineral naturally occurs in western Utah, but now I get to watch aragonite crystals grow right at home. Normally, crystallization takes millions of years through natural metamorphic processes — but with this experiment, the crystals will begin forming within just a few days and will finish once all the vinegar has totally evaporated. 😍✨ I'll be posting daily updates for th