Eagles mate while airborne.
44
A cow produces 200 times more gas a day than a person.
90
When you correct for weight differences, men are proportionately stronger than horses.
64
The world's smallest mammal is the bumblebee bat of Thailand, weighing less than a penny.
60
It's possible to lead a cow upstairs, but not downstairs.
50
Salmon can jump as high as 6 feet.
40
The most powerful electric eel is found in the rivers of Brazil, Columbia, Venezuela, and Peru, and produces a shock of 400-650 volts.
45
The lifespan of mammals is about 1 and a half billion heartbeats.
127