In the late 1980's, perfectly preserved 3000-year-old mummies began appearing in a remote Chinese desert. They had long reddish-blond hair, European features and didn't appear to be the ancestors of ...

Here's your chance to crack ciphers similar to those Bletchley Park's codebreakers faced during World War II. Below, we present three ciphers of different levels of difficulty, from easiest to most ...

NOVA Labs: Most of what we know about solar science comes from reading the Sun's light.