Argentinosaurus, an enormous herbivorous dinosaur, lived roughly 90 million years in the past in Argentina, reaching lengths of as much as 100 ft and weighing round 100 tons.

Spinosaurus, a semi-aquatic theropod dinosaur from the late Cretaceous Interval, is estimated to have been over 15 meters lengthy and weighed 8 metric tons, with diversifications for looking in water.

Shastasaurus, a prehistoric marine reptile from the late Triassic interval, might attain lengths of as much as 20 meters, making it comparable in measurement to trendy blue whales.

Megalodon, a large prehistoric shark that lived round 23 to three.6 million years in the past, might have reached lengths of 18 meters and weighed as much as 60 tons, with a chunk pressure estimated between 10 and 18 tons.

Livyatan, a predatory whale from the Miocene epoch, might develop as much as 18 meters lengthy and weighed between 50 to 60 tons, that includes massive serrated enamel suited to looking marine mammals.

Paraceratherium, a hornless rhinoceros-like mammal from the Oligocene epoch, weighed as much as 18 metric tons and stood over 5.5 meters tall on the shoulder, making it one of many largest land animals ever.

Blue whales, the biggest animals to have ever lived on Earth, can develop as much as 30.5 meters in size and weigh as a lot as 200 tons, with a coronary heart weighing round 680 kilograms.