What year was the first pair of stereo headphones produced?

More Questions:

Which two boxing weight classifications are named for animals?

What popular tea is named after an 1830’s United Kingdom Prime Minister?

What scifi author is credited with coining the "Three Laws of Robotics"?

What adventure tale introduced: "Yo-ho-ho, and a bottle of rum!'

In which country is Angel Falls located?

What is the capital of Cyprus?

What phenomenon is named for the French words for "already seen"?

What vitamin group, important for vision and bone growth, includes retinol?

In which movie does Clint Eastwood utter the line "Go ahead, make my day"?

Marvin Lee Aday is the real name of which well known singer?

What Scottish city is the setting for "Trainspotting" according to the plot?

The SALT II treaty was signed by Jimmy Carter and who else?

Which US president had a sign on his desk that read "The Buck Stops Here"?

After the Civil War, which Union general became the first president of the NRA?

US President Woodrow Wilson was a member of what political party?