It's time to take a look at the top 10 biggest land animals that ever walked the earth! In all fairness, we are only looking at mammals. We have omitted the blue whale since it's a marine animal. We also omitted any dinosaur or animal that lived partly in water to suspend its own weight. This list will also include marine mammals that spend some to most of their life on land. We also only listed one species of elephant, and one type of mammoth.