Publieke mindmap door Jason Buberel. Create your own collaborative mind maps for free at www.mindmeister.com
, also known as , was an ancient method of designed to inflict . The name comes from the word , meaning "scooped (or hollowed) out".
The fossils found in north-west Australia's Pilbara region (pictured) are thought to be nearly 3.5billion years old and caused by bacteria which existed just a billion years after Earth formed.
Watch free, online full length documentary films, videos from conspiracy, economics, environment, health, history, politics, mystery, religion and science