Amphicoelia is the biggest animal that ever lived on Earth. It also possessed one of the largest pincers ever attached to aam anthropoid, an amazing 18 inches long. 7 Largest Land Mammals Ever. A blue whale is the largest animal ever known to exist on Earth. Considered to be the largest scorpion to have ever lived, the gigantic creature was around 8 feet in length. The largest land animal that ever lived is likely Amphicoelias fragillimus, a sauropod dinosaur known only from a single vertebra fossil fragment, measuring 1.5 m (5 ft) in height, which has since been lost. Blue whales, which can grow to around 100 feet in length, are often touted as the largest animals to have ever existed on earth. Blue whales are the largest animal ever to move across the planet, with the biggest measuring in at over 100 feet long and weighing hundreds of thousands of pounds. It might not seem like it, but we live in a world full of giants. But growing conditions are different in the ocean. In fact, the Blue Whale is the largest animal to have ever existed, but they live in the sea and weren’t included on this list. December 28, 2018 December 24, 2018 by Jennifer Jones. In terms of mass, Earth’s largest mammal is the blue whale (Balaenoptera musculus).Weighing approximately 136 metric tons (150 tons) and growing to a length of more than 30 meters (98 feet), it is also the largest animal that ever lived. In its complete form, it was estimated the entire vertebrae fossil would have been 2.7 m … Spinosaurus was the largest land predator that ever lived, even bigger than Tyrannosaurus. They could reach 58 meters in length, and one vertebra of this animal was 2.5 meters. Jaekelopterus. Of course, what is a list of biggest animals without giant predators? The 20 biggest prehistoric mammals today s whales are huge but why aren t animals you are so glad extinct largest animal ever on the pla earth the 20 biggest prehistoric mammals What Are The Largest Prehistoric Animals SporcleWhat Is The Largest Land Animal To Ever Exist QuoraThis Ancient Reptile Was One Of The Most… Read More » Today, mammals still reign as the largest animals on Earth. These herbivore dinosaurs lived 145-161 million years ago. Here are the deadliest prehistoric animals on planet Earth, Prehistoric Animals 1.