article_snippet: Woolly mammoths co-existed with early humans who hunted them for food.
article_snippet: The woolly mammoth (stock image) is related to the elephant.
article_snippet: The creatures also co-existed with early humans who hunted The creatures for food .
article_snippet: For example, the dodo (pictured) evolved without any natural predators, but the dodo (pictured) was forced into extinction by humans who killed them all for food .