The Archives
397 enduring inquiries, newest first. Browse by topic or explore chronologically.
Page 5 of 17
geography7 min readHow Deep Is Krubera, the Deepest Cave on Earth?
Krubera Cave drops 2,224 metres into the Arabika Massif, per a 2024 survey, edging out neighbour Veryovkina. But the record depends on which survey you accept.
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geography7 min readWhat Happens to Your Body in Everest's Death Zone?
Above 8,000 metres on Everest, thin air starves the body of oxygen, clouds judgment, and can flood the brain and lungs. Here is what the death zone does.
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geography6 min readWhy Is Arica Called the Driest City on Earth?
Arica in northern Chile averages just 0.76 millimetres of rain a year, yet 260,000 people live there. Cold ocean water, high pressure and the Andes keep it dry.
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geography8 min readWhat Is the Most Remote Inhabited Island on Earth?
Tristan da Cunha sits thousands of kilometres from inhabited land, with no airport and only a handful of ships a year. This is how its isolation works.
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geography8 min readWhy Is the Dead Sea the Lowest Place on Land?
The Dead Sea sits about 430 metres below sea level because plates are pulling its valley floor down while evaporation traps it. Here is why it keeps falling.
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geography8 min readWhy Is There No Road Across Panama's Darien Gap?
The Pan-American Highway stops at Yaviza and restarts at Turbo in Colombia. Rainforest, swamps, disease fears and indigenous opposition kept the gap roadless.
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science7 min readWhat Is a Haboob Dust Storm and How Does It Form?
A haboob is a towering wall of dust driven ahead of a collapsing thunderstorm. Here is how downdrafts build it, where it strikes, and why drivers fear it most.
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science7 min readWhat Is Freezing Rain, and Why Is It So Dangerous?
Freezing rain stays liquid below freezing, then turns to glaze ice on contact. It coats roads, trees and power lines, and a thin layer can be devastating.
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science6 min readWhy Does Rain Smell So Good After a Dry Spell?
Rain itself has almost no scent. The smell after a dry spell comes from soil microbes, plant oils and storm ozone, launched into the air by falling drops.
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science7 min readHow Do Forecasters Predict a Hurricane's Path?
Hurricane tracks are forecast by tracking steering winds, running many computer models, and blending them into one official path with a cone of uncertainty.
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science6 min readWhat Is a Dust Devil, and How Does It Form?
A dust devil is a column of dust raised by intense ground heat, not a miniature tornado. Learn how it forms, why it spins, and when it can turn dangerous.
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science6 min readWhy Does Fog Form on Some Mornings and Not Others?
Morning fog appears when a clear, calm night cools moist air to its dew point, turning vapor into droplets. Clouds, wind, or dry air can spoil the recipe.
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geography6 min readHow Tall Is Angel Falls, Earth's Tallest Waterfall?
Angel Falls drops 979 metres from a flat-topped Venezuelan mountain, so high its water turns to mist before landing. Here is how that number is measured.
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geography6 min readWhy Is the India-Bangladesh Border So Strange?
The India-Bangladesh border winds through rivers, villages and farmland, and until 2015 it held 162 enclaves. Its shape comes from old deals and partition.
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geography6 min readWhy Is Vatican City a Country All of Its Own?
Vatican City covers less than half a square kilometre inside Rome, yet it has its own government, stamps and passports, thanks to a 1929 treaty.
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history7 min readHow Did Persians Store Ice in the Desert?
Persian engineers froze water on winter nights in desert ponds, then kept it through summer inside thick-domed yakhchals. Shade, dry air and earth did the work.
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history7 min readHow Did the Romans Build Concrete Harbors Underwater?
Roman harbors needed walls that hardened underwater. Volcanic ash and lime, poured into wooden boxes at Caesarea, gave them that. Seawater made it stronger.
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history8 min readHow Did the Romans Heat Their Bathhouses?
Roman bathhouses had no thermostat: a furnace under a raised floor heated rooms by distance, hottest nearest the fire. Here is how the hypocaust system worked.
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history6 min readHow Did the Byzantines Raise the Hagia Sophia's Dome?
Two scholar-architects raised a 31-metre dome over a square hall in 537. Pendentives, half-domes and a ring of windows made the vast vault appear to float.
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history6 min readHow Did the Parthenon's Optical Tricks Work?
The Parthenon looks perfectly straight, yet almost nothing in it is. Its builders curved the base, swelled the columns and leaned them inward to fool the eye.
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geography6 min readWhere Is Mawsynram, the Wettest Place on Earth?
Mawsynram in Meghalaya averages about 11,872 millimetres of rain a year. Monsoon winds off the Bay of Bengal, forced up the Khasi Hills, explain the deluge.
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history7 min readHow Were Egypt's Obelisks Carved and Raised?
No cranes, no iron tools: Egyptian workers pounded, floated and tilted single granite blocks into towering obelisks. Here is how each step worked.
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science7 min readWhat Is the Jet Stream, and Why Does It Steer Weather?
High above the clouds, a narrow river of fast air steers storms across continents. Here is how temperature contrasts create the jet stream and its waves.
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science7 min readWhy Does Hail Form in Warm-Weather Storms?
Warm days feed the fiercest hailstorms: strong updrafts lift rain into freezing cloud tops, where supercooled drops freeze into layered ice stones.
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