How to do a recessed manhole cover! #landscaping #landscaper #manhole #manholecover #drain #drains #diy #gardenproject #gardendesign | Macclandscapes

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A nuclear test in 1957 might have sent a manhole cover into orbit. | The History Archives

In 1957, scientists might’ve accidentally made space history with a manhole cover. During a nuclear test in Nevada, a steel cap sealed over a deep shaft was blasted into the sky at an estimated 125,000 mph. That’s five times the speed needed to leave Earth! Only one blurry frame on a high-speed camera caught it before it vanished. Some say it burned up in the atmosphere, others think it might’ve become humanity’s first object in space even before Sputnik. Either way, it's one wild Cold War myste