People for hundred of years tell stories about big, haired creatures, that looks like an ape but lives in the mountains and desert places. They are also called Bigfoot or Sasquatch. They are the part of Native American folklore that existed long before Europeans arrived on the continent. In the past 50 years alone, there have been thousands of reported Bigfoot sightings in the United States and Canada, and many people claim to have seen a similar creature in the Himalayas. But still there aren't strong physical evidences of existing, such as bones, liars etc. Nobody got succeed to catch one.
Scientist's researches are said that 1 to 9 million years ago inhabited creature that could be ancestors of Yeti. They are closest relatives of orangutan, as people more close to chimpanzee and gorilla.
Anyway there are no even serious scientific researches of finding contact with them. Of course we should find out if they exist first.
Also there is theory that these creatures have superstition