Cows can sleep standing up, but they can only dream lying down.
745
When cats are happy, they may squeeze their eyes shut.
10
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The seahorse is the only fish to have a neck.
12
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12