The answer, researchers suggest, lies in a widespread neural network - the brain's "mental workspace" - that consciously manipulates images, symbols, ideas and theories .
A new study, part of National Geographic's Genographic Project, shows modern-day Uros people in Peru and Bolivia descended from the earliest settlers at Lake Titicaca.
The world’s thinnest glass is just a molecule thick, a serendipitous discovery by scientists, recorded for posterity in the Guinness Book of World Records.