1952: Swiss expedition to Everest Hears Yeti Calls

The legend:

In 1952, a Swiss expedition to Everest (or just the Himilayas) heard yelps that were beleived to come from a yeti.


        My only source for this incident at the moment is just three sentences from an article about the "wild men of Everest" published in a 1957 issue of Popular Science. Naturally, this needs to be investigated further before it's trusted.