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These creatures reach a staggering 100 feet (30 meters) long, and they weigh upwards of 200 tons (181 metric tons). Whales are the largest animals in the world, even larger than some species of dinosaurs. Ironically, whales are among the gentlest creatures we know. There ... Blue whales are record breakers when it comes to the size department. The largest blue whale on record weighed 418,878 pounds. The longest blue whale ever ... The heart of an adult blue whale is the largest of any mammal. A blue whale's heart can weigh up to 1,300 pounds and is the size of a ... Far bigger than any dinosaur, the blue whale is the largest known animal to have ever lived. An adult blue whale can grow to a massive 30m long and weigh ... Baleen whales evolved from toothed whales, and they are some of the largest animal species on Earth. Toothed whales, on the other hand, are ... The Blue Whale Blue whales are the largest animals ever to have lived on Earth Research has never yielded proof of an Earthly animal larger ... Sperm whales are the world's largest predator, with males reaching lengths of up to 67 feet (20.5 meters) and weights of up to 90 tons (81 metric tons). The blue whale is the largest animal that ever lived. It is even bigger than the great dinosaurs of long ago. The Vancouver Aquarium Marine Mammal Rescue Centre is one of the world's largest hospitals dedicated for sick, injured or orphaned marine mammals. Learn ...