The earth was formed 4.6 billion years ago.
- What are the Ten Commandments?
- How many rules of “literary art” did Mark Twain say James Fenimore Cooper violated in The Deer-slayer (1841)?
- What are the major cycles of English mystery plays?
- How much of the earth is unexplored?
- When was the National Legion of Decency formed?
- When was Twentieth Century Fox formed?