First, let’s picture a small, modern day rodent. Now, let’s picture the largest rodent to have ever lived. That’s Phoberomys, which are currently extinct animals that used to roam around our planet. They wandered the lands of South America during the Late Miocene, which was 11.6 million to 5.3 million years ago, and the Early Pliocene, about 5.3 million to 3.6 million years ago. More specifically, they lived in the Orinoco River delta. They had high-crowned premolars and were herbivores. Despite the fact they ate only plants, it doesn’t make them any less terrifying (Britannica).