What year was the first pair of stereo headphones produced?

More Questions:

In the 1890's, what type of cheese did a California man named David Jacks introduce?

Vinnie Jones was associated with which sport?

In 1976-1977 season in 80 games, the Montreal Canadiens set the NHL record for how many points in a season?

Which company introduced the Mangusta in the 1960’s?

What is the first possible property purchase on Monopoly?

In what 1952 play is Giles Corey "pressed" to death, his last words being "More weight"?

Who wrote the 1938 play "The Corn Is Green"?

What state capital city lies on the River Torrens?

Luteinizing hormone is produced by what gland in the human body?

Who released an album in 1973 titled "Goodbye Yellow Brick Road?'

Who in the world of music and born 1984 has the real nameVictoria Christina Hesketh?

The American rock band, "The Black Keys', hails from which US state?

What did JFK call "the most hazardous and dangerous and greatest adventure on which man has ever embarked"?

What branch of Christianity introduced the Advent calendar?

What is the atomic number for Palladium?