Some sharks remain on the move for their entire lives. This forces water over their gills, delivering oxygen to the blood stream. If the shark stops moving then it will suffocate and die.

The longest place-name still in use is: Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiakitnatahu, a New Zealand hill.

All of David Letterman's suits are custom made - there are no creases in his suit trousers.

AMAZING FACTS