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GEOGRAPHY

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Bio - Fauna

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Heaviest Extinct Animals

This list features the heaviest extinct animals ever discovered on Planet Earth.

RANK

FAUNA

WEIGHT

1

Argentinosaurus

100 tonnes

2

Patagotitan

70 tonnes

3

Dreadnoughtus

65 tonnes

4

Sauroposeidon

60 tonnes

5

Megaolodon

50 tonnes

6

Paraceratherium

20 tonnes

7

Spinosaurus

20 tonnes

8

Wooly Mammoth

6 tonnes

9

Elasmotherium

4 tonnes

10

Giant Ground Sloth

4 tonnes


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References

Lacovara, K. J., et al. (2014). "Dreadnoughtus." Scientific Reports. [Accessed 6 Jul. 2025] Larramendi, A. (2009). "Estimation of the weight of the largest dinosaurs." Proceedings of the Royal Society B: Biological Sciences. (Argentinosaurs) [Accessed 6 Jul. 2025] Lister, A. M. (1996). "The Evolution of the Rhinoceros." (Elasmotherium) [Accessed 6 Jul. 2025] McClendon, B. J. (1997). Megalodon: The Super Shark. [Accessed 6 Jul. 2025] Miller, I. (2008). "Megatherium: The Giant Ground Sloth." [Accessed 6 Jul. 2025] O. C. Marsh (1881). "The Larger Fossil Mammals of North America." (Paraceratherium) [Accessed 6 Jul. 2025] Wedel, M. J. (2000). Journal of Vertebrate Paleontology. (Sauroposeidon) [Accessed 6 Jul. 2025] González, D. M., et al. (2017). "Patagotitan." Nature. [Accessed 6 Jul. 2025] Ibrahim, N., et al. (2014). "Spinosaurus." Science. [Accessed 6 Jul. 2025] Haynes, C. V. (1991). "Mammoths and Other Ice Age Mammals." [Accessed 6 Jul. 2025]
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