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Would You Face a Bear With a Spear? Ancient Humans Might Have
This form of bear hunting took nerves of steel.
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The Failure That Led to the Columbia Tragedy
A small piece of insulation caused catastrophic damage.
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Göbekli Tepe: The 11,500-Year-Old Mystery That Rewrote History
What archaeologists found here reveals one of the biggest turning points in human history.
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This Is Where the First Alphabet Was Born
It became the basis for most written languages, beginning 4,000 years ago in the Sinai desert.
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How Astronauts Avoided Disaster Building the International Space Station
A dangerous spacewalk, a toxic leak, and a breathtaking view of Earth.