For most of human history, green eyes didn’t exist. Understanding why they do now means rethinking what we know about ...

A bizarre, cyclops-like creature from nearly 600 million years ago may hold the key to how your eyes—and even your sleep cycle—evolved. Scientists have discovered that all vertebrates, including ...

In early April 2026, the Artemis II mission captivated me and millions of people watching from across the world. The crew’s courage, skill and infectious wonder served as tangible proof of human ...

In their first comments to the media, the Artemis II astronauts speak about the wonder and fear of the historic mission. It has been almost a week since the four Artemis II astronauts completed their ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Here’s what you’ll learn when you read this story: Eye color comes down to a pigment ...

Dragonflies may see the world in a way that pushes beyond human limits—and surprisingly, they do it using the same molecular trick we evolved ourselves. Scientists discovered that these insects can ...

Lock eyes with a chimpanzee, and you will notice something is missing. The tissue surrounding their iris, called the sclera, is a deep brown or nearly black. You cannot easily tell where they are ...

Scientists have finally solved a major flaw in a century-old theory of color perception first proposed by Erwin Schrödinger.

The bird retina is one of the most energetically expensive tissues in the animal kingdom, yet it doesn’t use the energy ...

From rigid brow ridges to expressive arches, your eyebrows tell a story of how human faces evolved to signal emotion, ...