A massive spinning ice disc is attracting global attention after appearing in the middle of a river in the US.
Footage recorded using a drone shows the sheer size of the ice disc in the Presumpscot River in the Maine city of Westbrook.
The circle, which has drawn crowds, has a diameter of around 300 feet, according to the Portland Press Herald.
Mark Battle, a physics professor, told the newspaper that the circle’s rotation is probably powered by the river current.
The local council posted the video to its Facebook page, telling followers: “It looks like the moon has landed in Westbrook.”
Rob Mitchell, who owns a nearby office building, spotted the alien-looking disc and immediately notified the city.
Officials said the disc is spinning slowly counter-clockwise and has served as a big raft for ducks and other birds.
“The ducks were rotating on this big Lazy Susan,” Mr Mitchell said.
According to The New York Times, the ice discs are rare but natural.
They occur when a pile of slush freezes or a piece of ice breaks off from another and begins to rotate. As it turns, hitting rocks and water, the sides are shaved down.
Locals said they have seen smaller ice discs before but nothing like this one, according to Tina Radel, the city’s marketing and communications manager.
