According to the researchers, U-boat gunners viewing ships from a distance likely fell for an optical illusion that made the vessels appear as if they were traveling along the horizon. That ...

Can you spot the hidden number? This optical illusion features a grid of identical circles with 96 and 69, but one lone circle has the number 99. Optical illusions like this challenge your observation ...

A passenger ship in dazzle camouflage ... This indicates that another factor, beyond dazzle camouflage, was influencing the illusion. They identified the horizon effect and concluded it ...

This optical illusion features a horse walking in a snowy ... appears out in the wild – and these incredible ‘floating’ ships might just be the most mind-boggling phenomenon we’ve seen.