In the 1950s, yeti hunting was all the rage among explorers. In 1951, mountaineer Eric Shipton’s expedition to Mt. Everest brought back photos of a mysterious three-toed footprint; in 1954, the Daily Mail sent scientists and mountaineers on a 6-month “Snowman Expedition” to the Himalayas specifically to find the mysterious creature. None of their research was conclusive, but that didn't stop adventure-seekers from trying to find evidence of the yeti's existence.

The U.S. government took the time in 1959 to remind these zealots that if they found a yeti, they couldn't shoot it. Unless it was trying to kill them, of course.

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