Cows can sleep standing up, but they can only dream lying down.
745
In 2005, in Africa, it was reported that three lions rescued a 12-year-old girl from kidnappers and guarded her for half a day until help came.
46
The seahorse is the only fish to have a neck.
12
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
The elephant brain weighs about 6,000g.
274
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20