Scientists have traced the human eye back to a tiny one-eyed ancestor that lived nearly 600 million years ago — and remnants of that ancient “cyclops” eye may still survive inside our brains as the pineal gland
In 1942, scientists stacked roughly 45,000 graphite blocks beneath the stands of a Chicago football stadium and started the world’s first nuclear reactor — while one physicist waited nearby with an axe, ready to cut a rope and drop an emergency rod if the reaction ran out of control
A 300,000-year-old jawbone from China refuses to fit neatly into the human family tree — and a reconstructed million-year-old skull is now suggesting our major ancestral branches split hundreds of thousands of years earlier than we thought
Humpback whales can sing for up to 16 hours without stopping, and scientists have found their songs are synchronized with every dive — different themes line up with the descent, the deep-water phase and the climb back to the surface