Long-overlooked marvel of ancient Indigenous engineering gets validation in Ohio
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YouTubePBS NewsHour
Long-overlooked marvel of ancient Indigenous engineering gets validation in Ohio
On Native American Heritage Day, we examine a long-overlooked marvel of ancient engineering that had been tucked away beneath a golf course in Ohio. It is a place some archaeologists say is on par with Stonehenge. But its struggle for recognition spanned decades, ending only recently with validation as the state’s only World Heritage site ...
126.3K views6 days ago
Shorts
⚠️ When a small change led to one of history’s deadliest engineering disasters. On 17 July 1981, the Hyatt Regency Hotel in Kansas City became the site of unimaginable tragedy when two suspended walkways collapsed during a crowded event, killing 114 people and injuring over 200. The cause? A seemingly minor design change. Originally, both walkways were to hang from continuous suspension rods. But during construction, this was altered to two shorter rods, connecting the upper walkway to the ceili
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⚠️ When a small change led to one of history’s deadliest engineering
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