4. Yeti
The Yeti, also known as the Abominable Snowman, is a legendary creature said to roam the snowy peaks of the Himalayas. Adventurers and scientists have braved harsh conditions to collect hair, bone, and footprint samples in hopes of proving its existence. However, a 2017 DNA study published in the Proceedings of the Royal Society B revealed that most samples attributed to the Yeti actually belonged to local bear species. The mystery, nonetheless, endures.