It is impossible to lick your elbow.

A crocodile can't stick it's tongue out.

A shrimp's heart is in their head.

People say "Bless you" when you sneeze because when you sneeze,
you're heart stops for a mili-second.

In a study of 200,000 ostriches over a period of 80 years, no one
reported a single case where an ostrich buried its head in the sand
(or attempted to do so).

It is physically impossible for pigs to look up into the sky.

A pregnant goldfish is called a twit