The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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Cats and dogs can hear ultrasound.
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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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If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
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The cat brain weighs about 30g.
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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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