Chocolate's addictive properties are due to what alkaloid?

More Questions:

What year did Volkswagen introduce the Golf GTI?

What sport in the Olympics includes tucks, twists and pikes?

Maria Sklodowska became famous under what name?

Who won the US Open men's tennis title in 1990 at the age of just 19?

Which author and philosopher is known for his works The Plague, The Outsider and The Fall?

Which ocean does Somalia has water access to?

Which non-coastal western US state has the seagull as its official state bird?

Durian fruit is banned from certain public places in South East Asia because of its what?

What bird is the smallest living bird?

What is the name of Woody's horse in the movie "Toy Story"?

What year saw the Battle of the Plains of Abraham?

In what year did Captain Cook reach New Zealand?

How many of Henry VIII's wives were executed?

What US state is represented by the figures of Will Rogers and Sequoyah in the Capitol's Statuary Hall?

Albert Einstein was offered the position of prime minister of what country?