'Flying' ship spotted off English coast

David Morris / Axis

A picture of a ship floating not on water, but in the sky, has left the internet truly confused.

David Morris, who was out walking his dog along the beach near his home at Lizard Point in Cornwall, captured the "ship floating above the horizon" on his phone.

"I told myself, 'It must be on water'," said Morris, a property developer. "My head doesn’t want to understand that, but it must be on water."

Turns out its a huge optical illusion - a superior mirage. It's what happens when there's a sudden temperature change and the air density shifts.

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