Octopi change colours when they become frightened. Normally they are a brownish colour, but can change to green or blue when fear sets in.

Parma ham is only Parma ham if it is made in the Parma region of Italy. The British chain supermarket Asda, made and packaged its own "Parma ham" and was successfully sued by the real Parma ham people (Parma Ham Trade Association).

The sperm of a mouse is actually longer than the sperm of an elephant.

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