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How heavy is 521 kilograms?

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 It's about two-and-a-half times as heavy as The Heart of a Blue Whale. In other words, the weight of The Heart of a Blue Whale is 0.380 times 521 kilograms. (Balaenoptera musculus) (adult)(for a 2014 specimen)The heart of a blue whale weighs about 200 kilograms. These hearts pump an estimated 7,100 L (1,875 gal) of blood through the whale's massive body. It's about three times as heavy as a Reindeer. In other words, 521 kilograms is 3.150 times the weight of a Reindeer, and the weight of a Reindeer is 0.3170 times that amount. (for Rangifer tarandus granti, adult, bull) (a.k.a. Caribou) ()Rangifer tarandus) An adult, male reindeer weighs between 159 and 182 kg. Reindeer undertake a lengthy annual migration, with some herds traveling up to 5,000 km. To all those observing, Merry Christmas from the Measure of Things. It's about three-tenths as heavy as a Car. In other words, 521 kilograms is 0.31540 times the weight of a Car, and the weight of a Car is 3.1710 times that amount. (for 2009 Ford Taurus; automatic transmission; curb weight)A 2009 Ford Taurus weighs 1,652 kg. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 386 kg. It's about three-and-a-half times as heavy as a Panda Bear. In other words, the weight of a Panda Bear is 0.290 times 521 kilograms. (a.k.a. Giant Panda, Ailuropoda melanoleuca)(Adult, male)An adult, male Giant Panda weighs up to 150 kg. Despite having the digestive system of a carnivore, the panda eats only bamboo and must eat up to 6.4 kg of it per day to compensate for the limited energy the plant provides. It's about one-fourth as heavy as a Giraffe. In other words, 521 kilograms is 0.270 times the weight of a Giraffe, and the weight of a Giraffe is 3.70 times that amount. (Giraffa camelopardalis reticulata) (adult, male, maximum of range)An adult, male giraffe can weigh up to 1,930 kg. Reaching 5.5 m (18 ft) in height by adulthood, giraffe calves can grow as much as 3 cm (1 in) per day. It's about one-fourth as heavy as a Rhinoceros. In other words, 521 kilograms is 0.250 times the weight of a Rhinoceros, and the weight of a Rhinoceros is 4 times that amount. (for Black rhinoceros, Diceros bicornis) (Adult, male)An adult black rhinoceros weighs between 1,400 and 2,800 kg. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros. It's about one-fifth as heavy as The Tongue of a Blue Whale. In other words, 521 kilograms is 0.190 times the weight of The Tongue of a Blue Whale, and the weight of The Tongue of a Blue Whale is 5.30 times that amount. (Balaenoptera musculus) (adult)The tongue of a Blue Whale can weigh up to 2,700 kilograms. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.