Amphibians

Is it an animal, or is it a fish? Well, the word amphibian comes from 'amphi' meaning half, and 'bi' meaning both, because an amphibian is both an animal and a fish, and neither, and half not either of them.

It is widely known that frogs, toads and salamanders are amphibians, but did you know that seagulls, mice and the tea plant Camelia Sinensis are also amphibious? No, I didn't think so.
In fact, many high-earning businessmen are now becoming amphibious, as amphibians pay tax at a lower rate than mammals due to their being cold blooded.

Mice

Mice is the plural of moose. For centuries mice were considered vermin, until it was discovered in the 20th Century that mice have magical powers.
Elephants are afraid of mice, which is why they have never become computer literate.