Dogs can make about 100 different facial expressions.
18
Humans and dolphins are the only species that have sex for pleasure.
61
Cows can sleep standing up, but they can only dream lying down.
745
At one 'feeding', a mosquito can absorb one and a half times its own weight in blood.
-1
A hummingbird weighs less than a penny.
1k
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
By feeding hens certain dyes they can be made to lay eggs with multi-colored yolks.
40