Dozens of witnesses took to social media to post photographs and video clips of the unusual aerial phenomenon.
Social media was awash on Friday with reports of strange objects, vapor trails and colored lights over the country.
Here we take a look back at the most popular historical mysteries and discoveries from the last twelve months.
The alleged entity was picked up on camera on a dark woodland path in Clumber Park, Nottinghamshire.
This hellish world was photographed in remarkable detail during one of the probe's recent flybys.
Dating back one million years, the remarkably intact skull has been hailed as an important find by palaeoanthropologists.
The unattached appendage had been found floating in the scalding-hot water by park staff earlier this year.
The end of the spacecraft's current mission was marked by a series of sonic booms over Florida on Saturday.
A motion-activated trail camera has picked up what appears to be a small humanoid creature peering out of the darkness.
NASA is preparing to test one of its latest creations - and it could very well spark a spate of UFO sightings.
The incident serves as a stark reminder of the danger these enormous snakes can pose to humans.
This fearsome looking denizen of the deep has needle-sharp teeth and a terrifying extendable mouth.
The destructive hurricane currently making landfall in the United States has been displacing the local wildlife.
Something has been spooking residents in one part of India and nobody seems to know exactly what it is.
A fisherman recently reeled in a rather strange looking shark and nobody is quite sure what species it is.
An explanation for this remarkable meteorological phenomenon was shared online by NASA - but not everyone was convinced.
Remarkable Met Office time-lapse footage shows clouds flowing like water over the Rock of Gibraltar.
A mystery creature sparked concern last week after it made its way into a shop in the Indian state of Bihar.
It might not be alive, but this remarkable chemical compound seems to be able to remember things for several hours.
Photographs of a long-necked animal in Loch Ness have been doing the rounds, but not everything is as it seems.