On October 7th, residents of the Chinese cities of Jiangxi and Foshan reported a strange sight - Towering skyscrapers that appeared to be dangling from the clouds. As the video of the 'floating city' went viral, it resulted in various theories. Some speculated the residents had seen a window to a parallel universe while others believed they had just glimpsed into a secret NASA project. Then there were the skeptics that dismissed the whole thing as a hoax. While that may still be the case, some experts believe that it could also have been a rare, naturally occurring optical illusion called Fata Morgana.