What phenomenon appeared the day Mark Twain was born and the day he died?

More Questions:

How many singers are in a sextet?

What makes popping corn pop?

When was Coca-Cola first introduced?

When does Mary Poppins say she will leave?

'Girls with a Pearl Earring" is one of only thirty-five extant works of what Dutch painter?

What 1964 Broadway hit centered on a milkman and his five daughters?

During what war was the novel "The Short-Timers" set?

In Arthurian legend, who is the illegitemate son of Sir Lancelot?

What is the largest inland lake in South America?

West Swan is a suburb in which Australian city?

What does the Schmidt index measure?

In what year did the TV show "The Hills" premier on TV?

Who played the role of Hank Moody on the TV show "Californication"?

What does Alf stand for in the TV show by the same name?

What was the nickname of the son of Cleopatra and Julius Caesar?