What chemical compound causes pain in muscles after exercise?

More Questions:

What is the more common name for a "double-eagle" on a gold hole?

In the novel "Fahrenheit 451', what does the title refer to?

Plato's "Apology" consists of what man's defence against a capital charge?

Which US state's name is derived from the French words for "green mountains"?

What is the fastest animal on earth that runs on two legs?

What inventor was known as the "Wizard of Menlo Park"?

What animal has been dubbed nature's skyscraper?

What is the correct term for a group of whales?

Which movie gave us the line "You talkin" to me?'

What is the stage name of Reginald Kenneth Dwight?

Who was the only bare-footed Beatle on the Abbey Road album cover?

Which two popular movie stars were in the 1988 movie "Mississippi Burning"?

Frank Sinatra died on the exact same night as the series finale of what popular TV show?

Who designed the Vietnam Veterans memorial in Washington DC?

What actor played the role of Dr. Frederick Frankenstein in the 1974 film "Young Frankenstein"?