Something to think about. Most people dont believe in Bigfoot or the Yeti and I personally think its the work of overly active imaginations. However just less then 100 years ago most people did not believe the Panda existed and a few years prior to that Gorillas were also considered a myth.
user209834982:
Well People were not able to travel and communicate like they do today. Historically speaking biology, and especially zoology are very new sciences.