One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
Condoms were originally made of animal intestines or linen.
347
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
The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
9
Sharks have been on the planet longer than trees.
14