One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
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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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Denmark has twice as many pigs as there are people.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Ants have tiny magnetic compasses in their antennae which help them navigate.
9
15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
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