Earth has famously been described as a "pale blue dot," but far in the past, the planet might have had an entirely different ...

Eyes are so fascinating and I’m glad you asked this question! When we talk about eye colour, we’re talking about the iris or coloured area around the dark dot (pupil) in the centre of the eye. Like ...

What color is a tree, or the sky, or a sunset? At first glance, the answers seem obvious. But it turns out there is plenty of variation in how people see the world—both between individuals and between ...