When cats are happy, they may squeeze their eyes shut.
10
A cow produces around 200,000 glasses of milk in her lifetime.
373
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
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
Cats recognise the voice of their owner, but never evolved to care.
22
A group of unicorns is called a blessing.
304
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23