Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Early American humans hunted car-size armadillos and used their shells for houses.
12
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
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19