Travel Photo of the Week: Guardian of Karnak Temple, Luxor, Egypt

One highly influential ancient Middle Eastern civilization established some of the essential systems we still use today. Think you know which it is?

Who Decided to Put 60 Seconds in a Minute? (2:33)

Da Vinci's The Last Supper plays a key role in the 2006 blockbuster hit The Da Vinci Code. Although the film's claims are more fiction than fact, could the painting actually contain a message from Leonardo?

Does 'The Last Supper' Really Have a Hidden Meaning? (4:03)

In this exclusive clip from the 1930s, Confederate veterans step up to the mic and let out their version of the fearsome rallying cry

What Did the Rebel Yell Sound Like? (4:22)

In 1828, John Jacob Astor built a trading post on the Missouri River. Business was so profitable that it only took four decades for Astor to become America's first multimillionaire.

America's First Multimillionaire (2:49)