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This is the blue whale, the biggest animal to ever live. Let’s put some of these numbers into perspective (note the exact numbers vary by source but these were the most common numbers I saw while researching): 200,000 kg (441,000 lbs). Tongue of 3 tons. Heart the size of a small car. 1,500 liters of blood. 30m (100 ft) long. I mean these things are absolutely giant