All the screens we look at every day emit a large quantity of blue light. That's fine for daytime use, but it can disrupt your sleep at night. That's because blue light stimulates your brain and fools ...

It’s one of the most pervasive messages about technology and sleep. We’re told bright, blue light from screens prevents us falling asleep easily. We’re told to avoid scrolling on our phones before ...

A peacock feather in sunlight shifts from blue to green to bronze as you turn it. Photograph it, and this shimmer collapses into one angle, one exposure, one compromise. A digital image is not a ...