An undated handout photo released on May 11, 2016 shows lead archeologist Professor Sue OConnor (R) and Phd student Tim Maloney (L) inspecting examples of the world's oldest known axe of which a fragment has been unearthed in Australia, scientists said, indicating that early indigenous technology was novel and inventive. A rock flake found in Australia is believed to be from the world's oldest known axe and likely dates from just after humans arrived in the country around 50,000 years ago, scientists said. / AFP PHOTO / STR / ----EDITORS NOTE ----RESTRICTED TO EDITORIAL USE MANDATORY CREDIT " AFP PHOTO / AUSTRALIAN NATIONAL UNIVERSITY" NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO ARCHIVESSTR/AFP/Getty Images
