For decades, it was thought that Brachiosaurus, a sauropod with its largest individuals possessing a length of about 29 m (96 ft), was not only the largest land animal, but approached the maximum possible weight a land animal could be (30-60 tons) and still support itself without needing to be suspended in water.
http://www.wisegeek.com/what-is-the-largest-land-animal-that-ever-lived.htm
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. In its complete form, it was estimated the entire vertebrae fossil would have been 2.7 m (8.8 ft) tall.
http://www.wisegeek.com/what-is-the-largest-land-animal-that-ever-lived.htm
Throughout the years, I’ve read countless books regarding which mammalian carnivore was the biggest, and I’ve always been confused as to which animal it was. I was wondering if a professional could inform me of which mammal REALLY was the largest on land, in terms of both mass and length. UpdateCancel.
https://www.quora.com/Which-prehistoric-mammalian-carnivore-was-the-largest-that-ever-lived-on-land
Other sauropods grew even larger than that. Supersaurus, Argentinosaurus, and Diplodocus were the largest creatures to ever walk the Earth, stretching more than 100 feet from their pencil-like teeth to their sinuous tails. But that “walked the Earth” clause is important.
http://www.slate.com/blogs/wild_things/2014/04/22/whales_or_dinosaurs_what_are_the_biggest_heaviest_longest_animals_ever.html
If it's height, then the Arctodus (short-faced bear) is the tallest, reaching average heights of 11 ft on its hind legs. But, undisputed in mass and length (and actually a bit surprsing), the southern elephant seal is the largest carnivore.
https://www.quora.com/Which-prehistoric-mammalian-carnivore-was-the-largest-that-ever-lived-on-land
The blue whale lives nowhere else in the known universe. What a tragedy it would be for our children and for future generations if the largest animals that ever lived on Earth were to become extinc. We owe it to our future, and to the Earth, to be better stewards of our planet.
https://goodheartextremescience.wordpress.com/2009/12/08/the-largest-animal-thats-ever-lived/
of 21. Biggest Whale - The Blue Whale (200 Tons) The Blue Whale, the world's biggest whale. Wikimedia Commons. At about 100 feet long and 200 tons, not only is the Blue Whale the biggest mammal in the world today, but it's the largest vertebrate animal in the history of life on earth: not even the largest dinosaurs approached it in bulk.
https://www.thoughtco.com/biggest-mammals-4065678
Fossilization was not very kind to the biggest dinosaurs. All of the heavyweight contenders are known from partial skeletons. Argentinosaurus—often cited as the largest known sauropod—is known from little more than a few vertebrae, ribs, and leg bones.
http://www.slate.com/blogs/wild_things/2014/04/22/whales_or_dinosaurs_what_are_the_biggest_heaviest_longest_animals_ever.html
The largest land-dwelling mammal on earth, at seven tons, the African Elephant is an order of magnitude smaller than the Blue Whale (see slide #2) for a good reason: the buoyancy of water helps to counteract the Blue Whale's weight, and elephants are completely terrestrial.
https://www.thoughtco.com/biggest-mammals-4065678
The blue whale is the largest animal alive on Earth today, although the exact maximum size is something of a moving target in the literature. This prodigious species is thought to be capable of reaching 110 feet in length, and the largest scientifically verified individuals on record are 89 to 98 feet long.
http://www.slate.com/blogs/wild_things/2014/04/22/whales_or_dinosaurs_what_are_the_biggest_heaviest_longest_animals_ever.html
what is the largest mammal land animal that ever lived
The largest mammal land animal that ever lived is an African elephant.