Mammutosaurus

Mammutosaurus is an extinct species of sauropod that lived in what is now Alaska in 75-63 million years ago in the Cretaceous and Paleocene period. It was the first ever confirmed species of sauropod that had supported feathers (or feather-like structures) all over its body, after its fossilized remains with feather-like impressions were found. Like all sauropods, it was a herbivore that fed on leaves from conifers and other types of trees. It was about twice the size of the largest African elephant in history. Despite surviving past the Cretaceous-Paleocene mass extinct