The Archives
385 enduring inquiries, newest first. Browse by topic or explore chronologically.
Page 15 of 17
history7 min readWhy the Titanic Sank So Fast and So Many People Died
An iceberg opened six compartments in a matter of seconds, and 1894 lifeboat rules left room for barely half of those aboard. Here is how the disaster unfolded.
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history6 min readHow the Taj Mahal Was Built: Grief, Marble and Symmetry
Shah Jahan began the Taj Mahal after Mumtaz Mahal died in 1631. Here is how 20,000 workers, Makrana marble and optical tricks produced its famous symmetry.
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history6 min readWho Built Machu Picchu? An Inca Emperor's Mountain Estate
Machu Picchu was a royal estate for the Inca ruler Pachacuti, lived in from about 1420. Here is how it was engineered, who really found it, and why it emptied.
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history6 min readHow Long Is the Great Wall of China? One Name, Many Walls
A 2012 survey measured the Great Wall at 21,196 km by adding up walls from many dynasties. Here is who built them, whether they worked, and the space myth.
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history7 min readHow the Colosseum Worked: Crowds, Awnings and Trapdoors
Numbered gates, a sailor-rigged awning and up to 28 animal lifts made the Colosseum a machine for 50,000-plus people. How it worked and why so much is gone.
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geography7 min readThe Sahara Was Once Green — Why Did It Become a Desert?
10,000 years ago the Sahara was grassland and lakes. How an orbital climate switch dried it into desert — and why it could turn green again.
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curiosities7 min readIs the Loch Ness Monster Real? What the Searches Found
Ninety years of sonar sweeps, hoaxes and DNA tests have found no monster in Loch Ness. Here is what each search turned up, and why people keep seeing one.
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geography6 min readThe Amazon River: Biggest by Far, but Is It the Longest?
The Amazon carries more water than any other river by far, but whether it beats the Nile for length depends on where you put its source and its mouth.
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geography7 min readIs the Great Barrier Reef Dying? The Bleaching Evidence
The Great Barrier Reef is not dead, but marine heatwaves now bleach it again and again. How coral works, what bleaching does, and what the latest surveys show.
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geography7 min readHow Old Is the Grand Canyon? Ancient Rocks, Young Gorge
The Grand Canyon's oldest rocks are about 1.8 billion years old, but the gorge itself is mostly 5 to 6 million years young. Here is how geologists know both.
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geography7 min readHow Tall Is Mount Everest? Why the Number Keeps Changing
Everest stands 8,848.86 meters tall by the latest official survey. Here is how 170 years of measurement reached that figure, and why it keeps moving.
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discoveries6 min readCosmic Microwave Background: Echo of the Big Bang
In 1964 two Bell Labs astronomers chased a hiss they could not remove. It was the oldest light in the universe, released when the cosmos was 380,000 years old.
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discoveries6 min readHow Penicillin Works, and Why Bacteria Fight Back
Penicillin kills bacteria by jamming the enzymes that build their walls. Why it spares human cells, how resistance spread and why most allergy labels are wrong.
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discoveries7 min readHow the Terracotta Army Was Made, and What It Still Guards
The Terracotta Army's roughly 7,000 figures came from central clay supplies, molds and hand carving. How they were made and armed, and why the tomb stays shut.
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discoveries7 min readDead Sea Scrolls: What They Reveal About the Bible
A shepherd's find near Qumran led to some 900 manuscripts in 11 caves. How the Dead Sea Scrolls were sold and published, and what they changed about the Bible.
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discoveries7 min readWhat the Rosetta Stone Says: A Decree for a Teenage King
The Rosetta Stone is a broken copy of a 196 BC priestly decree for 13-year-old Ptolemy V. What it promised, why it used three scripts and how it reached London.
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curiosities6 min readHow Were the Moai Moved? The Case for Walking Statues
Rapa Nui tradition says the moai walked. Statue shapes, old roads and rope trials now support it, and recast the story of the island's supposed collapse.
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curiosities7 min readWhat Happened to the Crew of the Mary Celeste?
In 1872 the Mary Celeste was found adrift with nobody aboard. Weighing the salvage-hearing evidence against each theory points to a hasty, mistaken abandonment.
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curiosities7 min readHow and Why Was Stonehenge Built? The Latest Evidence
Stonehenge's stones came from Wiltshire, west Wales and north-east Scotland. Quarries, chemistry and feasting debris now reveal how and why it was built.
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curiosities6 min readBermuda Triangle: Fact and Fiction Behind the Mystery
Records show the Bermuda Triangle loses no more ships or planes than other busy seas. Here is how a 1964 magazine story and a 1974 bestseller built the legend.
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history4 min readBletchley Park: The Secret Codebreakers of WWII
In a quiet English mansion, mathematicians and machines cracked the codes that shortened World War II. Meet the forgotten heroes behind the Enigma breakthrough.
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curiosities4 min readThe Antikythera Mechanism: A Computer from Antiquity
Discovered in a shipwreck, this ancient Greek device possessed mechanical complexity unseen again for a thousand years. Inside the world's first computer.
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history7 min readThe Silk Road's Lost Cities: Echoes of Forgotten Trade
Loulan and Niya ran dry and Merv fell to the Mongols in 1221. How the Silk Road's oasis cities lived, why they were lost and what the desert preserved.
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curiosities4 min readThe Unbreakable Code: Inside the Voynich Manuscript
For centuries, the world's brightest minds have tried and failed to decipher a single page of this mysterious 15th-century book. What secrets does it hold?
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