How often are brain cells replaced?

More Questions:

What does the abbreviation VH1 stand for in the TV station by the same name?

Boxer John L. Sullivan is often recognized as the first what?

What rare economic condition results when rising prices and recession occur at once?

What was the name of the lead character in the novel "The Scarlet Letter"?

Which capital city was once known as Byzantium?

What country is the Arch of Hardian located in?

Somnoplasty is a cosmetic procedure designed to help with what?

Dry ice is the frozen form of what gas?

Who played the Black Knight in the 1975 movie "Monty Python and the Holy Grail"?

What screen legend made his final appearance in the movie "The Shootist"?

Elvis's manager, Colonel Tom Parker, had what earlier act?

What future US congressman cowrote the Searchers" 1964 hit "Needles and Pins"?

What began on the early morning of Sunday, September 2, 1666, near London Bridge?

Before his ears were cut off in 1990 by a political rival, what nation was ruled by dictator Samuel Doe?

Forty six represents the atonomic number of which element?