One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
1
The reindeer is the only mammal that can see UV light.
17
The colossal squid has the largest eyes in the world.
4
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18