What river defines the southern border of Oklahoma?

More Questions:

How many times is a trains whistle blasted if it is about to move forward?

What was the first American company to manufacture color TV sets in the US?

During what war was the novel "For Whom the Bell Tolls" set?

Dale Arden, Princess Aura, and Dr. Hans Zarkov are characters from which classic American comic strip?

Buzzards Bay separates mainland Massachusetts from what land mass?

What was the name of the Earth's first artificial satellite?

What mineral is known as the softest mineral?

What movie is credited with popularizing the "little black dress"?

Which 2010 film, based on a comic book, did Brie Larson have a supporting role in?

What “Star Trek” character had a name meaning “freedom” in Swahili?

The Oscar for humanitarian work is named for what actor?

What kind of animal's kidnapping is solved in "Ace Ventura: Pet Detective"?

What is the name of the coffee shop the "Friends" gang frequents?

What year was Napoleon Bonaparte born?

The Bronze Age was characterized by the which of which metal and its alloy?