A mountain is a natural landform that rises dramatically above the surrounding terrain, typically at least 1,000 feet high (though geologists debate the exact cutoff). Mountains form through powerful geological processes: tectonic plates colliding and pushing rock upward, volcanoes erupting and building cone-shaped peaks, or erosion carving away softer rock to leave harder rock standing tall.

Mountains shape human civilization in profound ways. They create barriers that separate cultures and climates, trap moisture to form rivers that water entire regions, and challenge explorers to test their limits. The Himalayas divide India from Central Asia. The Rockies stretch like a spine down western North America. Mount Everest, Earth's tallest mountain at 29,032 feet, attracts climbers from around the world, though reaching its summit requires months of preparation and extraordinary endurance.

Mountains also appear in countless stories and expressions. When someone says they have a mountain of homework, they mean an overwhelming amount. Making a mountain out of a molehill means treating a small problem as if it were huge. People who accomplish difficult tasks are said to move mountains. These phrases reflect how mountains can symbolize both obstacles to overcome and achievements worth celebrating.