1958: The Dyhrenfurth Yeti Evidence
In 1958, Dr. Norman Dyhrenfurth, an American scientist in Katmandu, Nepal, announced he had evidence showing that the "yeti" of the Himalayas (a legendary race of wildmen) is a "very low grade of human or near human creatures."
Dr. Dyhrenfurth claimed to have explored caves that the beasts' had inhabited and to have culled a variety of physical evidence from these environments, most notably hair samples (silver-gray and reddish-brown), plaster casts of footprints, and food scraps. He stated his findings indicated the possibility of two different species of yeti, one maturing at a height of eight feet tall, and the other at a mere four feet tall.
My initial source for this account is Frank Edwards 1959 book, Starnger Than Science... and it has to be noted that he mis-spelled Dyhrenfurth's name as 'Dyrenfurth' (missing the first 'h'). This mistake has been repeated by a number of books since, which by deafult shows they got their information from Edward's book no matter what else they may claim.