A photic sneeze is often caused by what stimuli?

More Questions:

What type of a tree killed Sonny Bono?

Approximately how many acres is a baseball field?

What do the four letters stand for in the name of the US government agency FEMA?

What year did Wayne Gretzky retire from his professional hockey career?

From what language did English borrow the word "tsunami"?

What book series was written and illustrated by Jeff Kinney?

Which is the largest whale?

What is the name for a young deer?

Which ABBA song won the 1974 Eurovision Song Contest?

Who hosted "The Daily Show" before Jon Stewart?

With what artist did Kid Rock record the song titled "Picture"?

What musical instrument did Helen play on the TV show "Wings"?

What state saw the start of the American Revolution?

In which North American city would you find Joe Shuster Way?

In which country would you find the motor racing circuit called Kyalami?