Blue Whale: The Blue Whale is the largest animal that has ever existed on Earth, measuring up to 30 meters (98 feet) in length and weighing up to 200 tons.
Argentinosaurus: The Argentinosaurus is one of the largest land animals that has ever lived, measuring up to 40 meters (130 feet) in length and weighing up to 100 tons.
Spinosaurus: The Spinosaurus is the largest carnivorous dinosaur that has ever lived, measuring up to 18 meters (59 feet) in length and weighing up to 23 tons.
Paraceratherium: The Paraceratherium, also known as Indricotherium, is the largest land mammal that has ever lived, measuring up to 8 meters (26 feet) in height and weighing up to 20 tons.
Dreadnoughtus: The Dreadnoughtus is one of the largest dinosaurs ever discovered, measuring up to 26 meters (85 feet) in length and weighing up to 65 tons.
Brachiosaurus: The Brachiosaurus is one of the tallest dinosaurs that ever lived, measuring up to 13 meters (42 feet) tall and weighing up to 80 tons.
Stegosaurus: The Stegosaurus is one of the largest herbivorous dinosaurs that ever lived, measuring up to 9 meters (30 feet) in length and weighing up to 5 tons.
Titanoboa: The Titanoboa is the largest snake that has ever lived, measuring up to 13 meters (43 feet) in length and weighing up to 1,135 kg (2,500 pounds).
Megalodon: The Megalodon is the largest shark that has ever lived, measuring up to 18 meters (59 feet) in length and weighing up to 100 tons.
Elasmosaurus: The Elasmosaurus is one of the largest marine reptiles that ever lived, measuring up to 14 meters (46 feet) in length and weighing up to 2 tons.