Only 3% of bird species have penises.
0
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
A group of kittens is called a "kindle".
10