Deinotherium
These terrifying mammals were some of the largest non-dinosaur animals to roam the earth. These extinct animals weighed up to five tons, and were short with downward-curving tusks. They were found in Europe and Asia. They appeared during the Middle Miocene and survived until the Early Pleistocene. They’re similar to modern day elephants, but with more flexible necks. Fortunately, they would’ve probably left us humans alone, as their main diet consisted of leaves. It’s assumed they died out when forested areas slowly turned into grasslands, limiting their food supply (Thoughtco).