Handout photograph of fossilised footprint dating from the Ice Age of a megatherium-type sloth is seen in Guamini

 
Handout photograph of fossilised footprint dating from the Ice Age of a megatherium-type sloth is seen in Guamini
REFILE - CAPTION CLARIFICATION A fossilised footprint dating from the Ice Age, around 30,000 years ago, of an approximately five-ton megatherium-type sloth is seen in Guamini, some 490 kilometers (304 miles) southwest of Buenos Aires, in this handout photograph taken on February 8, 2012 and made available on March 4, 2012. The animal moved on its hind legs and became extinct 10,000 years ago. The footprints were discovered by scientists and investigators in an outcrop of clay slabs, according to a newsletter from the Felix de Azara National History Foundation and Maimonides University. REUTERS/Fundacion Felix de Azara/Handout (ARGENTINA - Tags: ANIMALS SCIENCE) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS