Feed your brain with these little gems!

Did you know;

1) A crocodile can't stick its tongue out. 
2) A shrimp's heart is in its head.
3) It is physically impossible for pigs to look up into the sky.
4) A pregnant goldfish is called a twit.
5) The "sixth sick sheik's sixth sheep's sick" is said to be the toughest tongue twister in the English language.

Fascinating.