Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Condoms were originally made of animal intestines or linen.
347
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
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