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Geology, climate, unusual places.
New research shows the gap in the Grand Canyon's rock record opened hundreds of millions of years earlier than geologists believed for a century and a half.
Learn more βBoulders on the dried-up Racetrack Playa in Death Valley leave long trails behind them, even though nobody ever moves them.
Learn more βBlood Falls is a natural spring where intensely red, salty water seeps out from beneath the Taylor Glacier.
Learn more βThe highly alkaline waters of Tanzania's Lake Natron preserve animal bodies in a way that looks like natural mummification.
Learn more βThe deepest point in Earth's oceans sits almost 11 kilometers below the surface.
Learn more βGeneral Sherman, a giant sequoia in California, is recognized as the single organism with the largest wood volume on Earth.
Learn more βMexico's Cave of Crystals in Naica hides gigantic selenite columns that grew for hundreds of thousands of years in perfectly stable conditions.
Learn more βLake Hillier on an Australian island stays an intense shade of pink all year round, no matter which angle you view it from.
Learn more βThe Darvaza crater in Turkmenistan, nicknamed the 'Gateway to Hell,' has been on fire for decades β and nobody's entirely sure when or why it started.
Learn more βLake Maracaibo in Venezuela hosts some of the most frequent lightning storms on Earth β the phenomenon runs almost nonstop on most nights of the year.
Learn more βOymyakon in Siberia is one of the coldest permanently inhabited places on Earth, where winter temperatures regularly drop below minus 50 degrees Celsius.
Learn more βLake Cerknica in Slovenia regularly dries up and refills thanks to hidden underground karst channels beneath its bed.
Learn more βSocotra Island off the coast of Yemen has been isolated for so long that it evolved plants unlike anything else on the planet.
Learn more βLake Baikal in Siberia is the deepest and one of the oldest lakes on Earth, holding a huge share of the world's unfrozen fresh water.
Learn more βChile's Atacama Desert is one of the driest places on Earth β in some regions, rainfall has been practically nonexistent for decades.
Learn more βSon Doong in Vietnam is one of the largest known caves on Earth β so enormous that trees grow and clouds form inside it.
Learn more βSurtsey Island off Iceland's coast was born from an underwater volcanic eruption in the 1960s and has been watched ever since as a natural laboratory for how an ecosystem begins.
Learn more βThe Cherrapunji and Mawsynram region in India ranks among the wettest places on Earth, where annual rainfall is measured in meters, not millimeters.
Learn more βEisriesenwelt in Austria is the world's largest ice cave open to visitors, with ice formations stretching many meters deep into the mountain.
Learn more βThe Richat Structure, known as the Eye of the Sahara, is a massive, concentric rock formation in the Sahara visible even from orbit.
Learn more βThe Giant's Causeway in Northern Ireland is a formation of thousands of near-perfect hexagonal basalt columns created by ancient volcanic activity.
Learn more βThe Dead Sea is so salty that the human body floats on its surface almost effortlessly, while the basin holding it keeps dropping lower every year.
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