In 1971 two campers recorded what a Navy linguist calls a nonhuman language in the Sierra Nevadas

According to Boing Boing, Ron Morehead and Al Berry recorded audio in the Sierra Nevada in nineteen seventy-one while searching for evidence of Bigfoot—Morehead was a believer, Berry a skeptic hoping to debunk the story. Their tape captures whispered conversation followed by distant howls. A Navy linguist later analyzed the sounds and called them a nonhuman language, a claim that's remained part of Bigfoot folklore for decades.

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