© South West News ServicePerfect ice circle rotating in the River Otter
An unusual rotating ice circle, normally found in the cooler rivers of Scandinavia or North America, has formed in the UK waterways.
The cause of the rare phenomenon is unclear, with very little scientific evidence available to explain the formation of the discs. UFO-enthusiasts claim that, like crop circles, the perfect discs are created by visiting aliens, but scientists believe the extreme cold weather combined with an unusual current is the more likely reason.