Traditional Japanese joinery uses no nails or adhesives — wooden pieces are cut to interlock perfectly.

Millionaires often live below their means.

More people die taking selfies than from shark attacks in some recent years.

More people in the world have access to a mobile phone than to a toilet.

Beethoven continued composing after going completely deaf, writing his Ninth Symphony while totally deaf.

The most translated book in the world is the Bible, available in over 700 languages.

During his entire lifetime, Vincent Van Gogh is known to have sold only a single painting.

The didgeridoo, played by Aboriginal Australians, may be the world's oldest wind instrument — over 40,000 years old.

Michael Phelps is one of the most decorated Olympians in history.