That bright, blue-rich light signals to your brain that it’s definitively daytime, helping to anchor your internal clock and set up a proper sleep-wake cycle.

Blue-light glasses were everywhere a few years ago, promising to save our screen-obsessed society from ourselves.

Blue light has acquired a dubious reputation in recent years, frequently blamed for everything from disrupted sleep patterns to digital eye strain. This high-energy light, emitted abundantly by ...

How Blue Light Hurts Sleep. Your eyes aren’t good at blocking blue light. So almost all of it passes straight through to the back of your retina, which helps your brain translate light into images.

The Mystery of Light: Why Earth Is Bright but Space Stays Dark. Posted: June 1, 2025 ... On Earth, sunlight interacts with our atmosphere, scattering light particles and creating a bright blue sky.

bright screen light — across 11 experimental studies, people who used a bright screen emitting blue light before bedtime fell asleep an average of only 2.7 minutes later.

Someone in Foster City said they were looking at the sky hoping for shooting stars when they saw “a very bright blue light falling from the sky.” “Way bigger than shooting stars,” they said.

Someone in Foster City said they were looking at the sky hoping for shooting stars when they saw “a very bright blue light falling from the sky.” “Way bigger than shooting stars,” they said.

bright screen light – across 11 experimental studies, people who used a bright screen emitting blue light before bedtime fell asleep an average of only 2.7 minutes later. In some studies, people ...

Light pollution is harming our health. As nights have gotten brighter, the list of health problems linked to artificial lighting has gotten longer, from insomnia to cancer.