I recently heard a fascinating Radiolab report about tetrachromacy—or the presence of a fourth cone for color perception in people, usually women. Most people can see a million colors; tetrachromats ...

Synesthesia is a neurological condition in which information meant to stimulate one of your senses stimulates several of your senses. People are usually born with the condition, but some people ...

After decades of exhaustive study, scientists have concluded that human tetrachromacy is real. Some people have a truly superhuman range of color vision. In fact, there are two distinct types of ...