Only 3% of bird species have penises.
0
Cows can sleep standing up, but they can only dream lying down.
745
15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
1
Condoms were originally made of animal intestines or linen.
347
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
When cats are happy, they may squeeze their eyes shut.
10
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.
10