A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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Only 3% of bird species have penises.
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By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
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Sheep, goats, octopuses, and toads have rectangular pupils.
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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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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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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