Australian Aboriganals for ceturies have spoken of and feared the "Bunyip" meaning "devil or evil spirit." It lives in Australia's waterways, described as having a dog's face with flippers and a horses tail. In 1818 European explorer Hamilton Hume found huge bones near some waterways which resembled a Hippopotamus {not an Australian animal} since then many huge mammals and other creatures bones have been found. Scientists believe these huge beasts became extinct thousands of years ago...or did they? If you Wiki "Australian MegFuana" or "Nototherium" and "Diprotodon" these are HUGE mammal beasts now extict...but did they co-exist with the ancient aborigines?
{Must have been global warming that killed them}