How often are brain cells replaced?

More Questions:

What Ayn Rand novel opens with the question: "Who is John Galt?"?

What ship was commanded by Captain Ahab?

In which city can you find the famed Arch of Hadrian?

What Irish author wrote the 1938 novel "Murphy"?

Who wrote the epic poem "Paradise Lost"?

In which country is Angel Falls located?

What is the top speed a freefalling object can reach called?

The popular caterpillar sushi roll features unagi, the Japanese word for what type of sea creature?

What artist’s first Greatest Hits album was named "The Immaculate Collection"?

What U.S. state gave the world Little Richard, Otis Redding and Gladys Knight?

What beer-centric movie begins with the MGM lion belching rather than roaring?

Who played the role of TV's J. J. Evans?

What song was Beach Boys" first Billboard number one hit?

Ferdinand Marcos and Corazon Aquino have both been Presidents of which country?

Dr. Jonathan Crane is the real name of which DC Comics supervillain?