What inert gas gets trapped in the blood when a diver gets "the bends"?

More Questions:

What traditional Russian instrument looks like a triangular guitar?

What does someone become after being canonized?

What is the name of Frodo's faithful gardener in "The Lord of the Rings"?

Which writers works include "The Dark Eyes of London', "Four Just Men" and "Sanders of the River"?

What year did The Louvre open as a museum?

What is the only nation that shares a land border with Denmark?

What large island is the most western point of land in Alaska?

What organization do the FLash, Wonder Woman, Superman, Batman and the Green Lantern all belong to?

What was the original working title of the Beatles movie "Help!"?

What actress starred simultaneously on "Dynasty" and "T.J. Hooker" during the early 1980s?

Which 1979 film featured a space ship named "Nostromo"?

What bird was used as an alias for CIA agent Joe Turner in a Robert Redford movie?

The April 13, 1919 Jallianwala Bagh Massacre of civilians by British troops is also known by what other name?

Which Argentinean Marxist, who became a bedroom poster icon of the 1960s, was once one of Fidel Castro's commander?

Comic book writer and artist Jack Kirby, was given what name at birth?