How often are brain cells replaced?

More Questions:

What do the letters A and W stand for in the "A&W" root beer name?

What ballet term translates literally as "in Arabic fashion"?

Who had the Ring immediately before Bilbo took it in "The Hobbit"?

Who was the real-life model for the character of Dill in the novel "To Kill a Mockingbird"?

In what country would you find the active volcano "Pelee"?

Which continent is the home of the tsetse fly?

In which country would you find the major port town Fremantle?

What does the Ring of Fire surround?

What inventor was known as the "Wizard of Menlo Park"?

What metal was Danish astronomer Tycho Brahe's nose made of?

Before the 2004 launch of Space Ship One, who was the last American ever to go into space alone?

Who was the first character Johnny Depp portrayed in more than one movie?

What is the name of Doc Brown's dog in the movie "Back to the Future"?

Who received a chalet called "the Eagle's Nest" for his fiftieth birthday in 1939?

What pseudonym was Norma McCorvey given in a historic 1973 Supreme Court ruling?