Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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