I have a form of time–space synesthesia, so the new year arrives for me in a very physical way. I feel myself move around the year, almost like I'm traveling along a structure. December sits low and ...

Pupil size in people with synesthesia changed depending on how bright or dark the perceived colors were.

Mary Jane Spiller does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...