To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Designers at NASA's ...

That’s because Luciani has a condition called aphantasia — an inability to picture objects, people and scenes in his mind. When he was growing up, the term didn’t even exist. But now, Luciani, a ...

An optical illusion is baffling people, with only those boasting "razor sharp" vision able to crack it. The festive period often encourages people to ditch the daily grind in favour of cherishing ...