What ended the era of steamboats on the Mississippi River during the 1870s?

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What fruit is "Citrus grandis"?

At the end of "The Da Vinci Code', the Holy Grail is revealed to be buried at what popular spot?

In terms of area, how much bigger is Queensland than the UK?

What is the only mammal naturally capable of true and sustained flight?

What protein is responsible for giving blood its color?

What disorder's name is derived from the Greek for "without appetite"?

How many pounds of jet fuel does a passenger Boeing 747 use during take off?

Which actor received the first Academy Award?

What future Oscar-winning actress played the title role on the 1960's sitcom "Gidget"?

In which movie did Christina Ricci portray a witch?

What famous ex-boyfriend of Jennifer Aniston once guest-starred on the TV show "Friends"?

Who popularized the Christmas tree in England in the 19th century?

What man received the Nobel Peace Prize in 1964?

On Christmas Day 800 A.D., who was coronated as emperor of the Holy Roman Empire?

What American discount retail chain is headquartered in Bentonville, Arkansas?