- The last one of the unsolved mysteries of the world in our list is the big cats in Australia. For the last 100 years, there have been semi-regular sightings of what appear to be exotic big cats roaming the bush in Australia. Theories as to how they got there include stories of circus train crashes, US Airmen keeping them as mascots during WWII then releasing them into the wild, as well as feral domestic cats growing to unheard of proportions out in the bush.
- The most famous is the “Gippsland Phantom Cat”, which was shot by a local hunter in 2005. Although DNA testing confirmed it was a feral cat, the creature was verified as being the size of a panther.