How Caves Form
    Earth & Space

    How Caves Form

    Slightly acidic rainwater dissolves limestone over thousands of years, then drips back to form stone icicles.

    Step inside a cave. Stone icicles hang from the ceiling. Stone pillars rise from the floor. Nothing here was BUILT — it was carved by water and time.

    Concepts you just met
    Carbonic AcidLimestone DissolutionStalactites / StalagmitesKarst