When hundreds of eerily perfect circles were discovered on the bottom of the Mediterranean Sea, theories abounded about what they could mean. Four years of underwater research revealed a lost world.

An algorithm designed by Professor John Daugman is the basis of all publicly deployed iris recognition systems across the world. Around 1.5 billion people have been enrolled onto iris pattern ...

Shot by Paul Nicklen and Cristina Mittermeier of the nonprofit group Sea Legacy, and published on National Geographic in early December, the video ignited a firestorm of debate about what ...