Earth's longest mountain range hides beneath the waves

Beneath every ocean on Earth, a mountain range stretching 65,000 kilometers winds around the globe in an unbroken chain — longer than any feature visible on land, yet seen by almost no one. The mid-ocean ridge system, submerged under thousands of meters of seawater, is not merely a geological curiosity but the very engine of plate tectonics, continuously forging new oceanic crust from the planet's molten interior. That humanity has mapped the surfaces of the Moon and Mars more thoroughly than this foundational structure of our own world speaks to how much of Earth's story remains unread.