Bats sleep 18-20 hours per day.
5
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
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
A lion in the wild usually makes no more than twenty kills a year.
186
The elephant brain weighs about 6,000g.
274