Although the furor about The Dress has died down somewhat since it first made the Internet explode a week and a half ago, we're all still weirdly fascinated by it. As such, it's not exactly surprising ...

Inspired by the tangents derailing this Lounge thread, one question which arose was how one really defines the color discernment of a tetrachromat - as the vast majority of humans are incapable of ...

Anyone who's ever stared in desperation at a paint colour chart will know that telling shades apart is not always the easiest task. Due to our biological differences, some people seem to have no ...