Denmark has twice as many pigs as there are people.
66
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Dogs have been man's pet for over 14,000 years.
224
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
Sheep, goats, octopuses, and toads have rectangular pupils.
7