At what age did tennis player Rafael Nadal turn professional?

More Questions:

What does the prefix "pseudo" mean?

What is the fear of light flashes called?

Which country were the 2010 Winter Olympic Games held in?

In the game "Battleship', how many hits does it take to sink an aircraft carrier?

Which European country replaced the Tolar with the Euro?

What year did Cambodia gain its independence from France?

What is a wallaby?

In 1986, a brittle O-ring seal was determined to be the cause of what?

What grows in a paddy field?

The "leap from the lion's head" is the final challenge in what 1989 movie?

Who were Bobby Hatfield and Bill Medley?

Who was the first actress to appear on a postage stamp?

30 Rock refers to what in the TV series "30 Rock"?

In the 1998 movie "You've Got Mail', Joe and Kelly are in what business?

Who led his troops to disaster at the Little Bighorn in 1876?