Reaching a maximum recorded length of 30 m, weighing as much as 148 000 kg, with a heart roughly the weight of
a small car, and living more than 90 years, Antarctic blue whales are the largest animals on Earth. Fin whales come a
close second, growing up to 27 m long. The two species are classified by the International Union for the Conservation
of Nature (IUCN) as critically endangered and endangered, respectively.
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