What's the biggest animal on earth?

By considerable measure, the largest known animal on Earth is the blue whale. Mature blue whales can measure anywhere from 75 feet (23 m) to 100 feet (30.5 m) from head to tail, and can weigh as much as 150 tons (136 metric tons). read more

A blue calf is approximately 26 feet (8 m) long and weighs about 8,000 pounds (3,629 kg), according to the World Wildlife Fund. Polar bears are the largest species of bear and the biggest carnivores on land. read more

The largest living land animal is the African Elephant which can weigh up to 6,350 kg (7 tons); they typically grow to 35 ft (10.6 m) from trunk to tail and have a shoulder height of 13 ft (4.2 m). There are at least two species, the savanna elephant and the forest elephant, and they currently cited as venerable in the IUCN Red List of Threatened Species. read more