Which drug can be extracted from the bark of the cinchona tree?

More Questions:

Who invented the correction fluid known as Liquid Paper?

Bill Gates dropped out of which of educational institution?

Which letter stands for the Roman number 50?

In the Anglo-Saxon poem, who killed Grendel?

Who wrote "Kubla Khan"?

What fairytale girl eats the window pane of the witch's cottage?

In what Australian state would you find the city of Launceston?

Which is colder, the North or South Pole?

The US state of California was originally part of which Spanish territorial colony?

Which spacecraft was the first one to leave the Solar System?

What gland found at the base of the brain is known as the "Master Gland" of the endocrine system?

What has the largest eyes in the world?

Who played Lester Burnham in "American Beauty"?

Which Egyptian city was founded by Alexander the Great in 331 BC?

In mathematics, which prefix refers to 10 to the power of 21?