Cows can sleep standing up, but they can only dream lying down.
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An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
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The elephant brain weighs about 6,000g.
274
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!)
11
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11
A scorpion can hold its breath for up to 6 days.
19
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.
10