A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
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The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
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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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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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