Today's mystery happened somewhere on Earth in August 1977. Read the clues, drop a pin, find the location.
CASE FILE OPEN
Witness statements
01Late 1970s, American Midwest — a fixed-dish radio telescope at a university-affiliated observatory was quietly scanning the sky in transit mode, logging signal data to a computer printout that almost nobody would read for days.
Tap, or use arrows then the button · drop a pinOFM · Field Station
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