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20 votes
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Which specific day of 1964 was the tree Prometheus (WPN-114) cut down?

An article in the Los Angeles Times gives a date in August... The tree, called Prometheus, took root at the dawn of the Bronze Age, centuries before the ancient Egyptians began construction on the ...
Steve Bird's user avatar
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8 votes
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When were public roads cleaned electromagnetically?

Well, the truck was definitely real, not an artists concept sketch. An image gallery at the Nevada Department of Transportation website shows the following picture: The caption simply labels it as an ...
justCal's user avatar
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7 votes

What was the technology in pre-war traffic recorders?

It's probably not possible to know how the specific apparatus in that photo works, but it appears that several inventors were trying to automate traffic counting at the time using sophisticated Rube ...
Denis de Bernardy's user avatar
3 votes

What was the technology in pre-war traffic recorders?

The device pictured is likely the product of IBM. Research brings up several books, which unfortunately only offer snippet views, but that is enough for a lead: Special Report - Page 105 https://...
justCal's user avatar
  • 40.6k

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