What is a parsec a unit of?

More Questions:

Whose paintings include "Two Half-Naked Women Seen from Behind in the Rue des Moulins Brothel"?

Who said, "Do give books - religious or otherwise - for Christmas"?

What was named for Pope Sixtus IV when it was consecrated in a 1483 Mass?

In "The Twelve Days of Christmas', what did my true love send to me on the seventh day?

Which Russian writer composed "Peter and the Wolf"?

Who is considered the father of the computer due to his plans for a steam-powered difference engine?

How deep is a fathom?

Which mosquito bites humans, male or female?

What Swedish pop group was anchored by sisters Jenny and Linn Berggren?

Who was the first host of "The Tonight Show"?

In what decade does the movie "Girl, Interrupted" take place?

What is the name of the actor who plays Dexter Morgan on the TV show Dexter?

What kind of animals are "Pinky and the Brain"?

Published in 1990 which Michael Crichton novel was made into an Oscar-winning film 3 years later?

How many of the seven wonders of the ancient world still stand?