The South American degu, a small rodent, uses urine to mark its passageways. Its urine reflects ultraviolet light, which the degu can see.

The trickiest tongue twister in the English language is apparently "Sixth sick sheik's sixth sheep's sick". Give it a try and see for yourself.

China is the world's largest market for BMW's top of the line 760Li. This car sells for $200,000 in China - more than almost all people in China make in a lifetime.

AMAZING FACTS