Cows can sleep standing up, but they can only dream lying down.
745
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
A dairy cow can produce more milk when listening to music.
446
Squirrels forget where they hide about half of their nuts.
698
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
There's a rare breed of pig that looks like a sheep.
14
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492