A lot of us take the fact that we can see a huge spectrum of colours for granted, but have you ever thought about why our cheeks flush when we’re ill? Or why our skin looks a little grey and dull when we’re feeling rundown? Well, according to evolutionary neurobiologist Dr. Mark Changizi (yep, that’s his ACTUAL job title) we’ve evolved to notice these subtle changes in colour in order to survive and help one another. … Read entire article »