Yoko Ono broke up the Beatles. Bill Buckner lost the 1986 Series for the Red Sox. We humans are pretty good at pointing the finger rather than accepting responsibility, and these 10 scapegoats have shouldered more than their fair share of blame. See more »

Some historians consider Abraham Lincoln the greatest U.S. president ever. But how much do you know about the 16th president? Take this quiz and test your knowledge of the Great Emancipator. See more »

If there's one message President Barack Obama wanted to get across during his campaign, it was that he represents change. Does his background match his message? See more »

When you think about the Middle Ages, you probably imagine knights, lords and ladies in a castle. Learn about how castles were constructed, how they were used and what became of them. See more »

Hairy, heavy-browed, dim-witted: This is our vision of a caveman. But the cavepeople created amazing art -- and cave dwelling didn't stop with the Neanderthals. See more »

Sen. Hillary Clinton came closer than any other woman to securing the nomination for president. How did she arrive at that point, and what did she want to accomplish if she had been elected? See more »

While Londoners in the East End saw their fair share of grime, drugs and prostitution, nothing could've prepared them for Jack the Ripper's bloody rampage in 1888. What's the story behind this legendary butcher? See more »

Joe Biden's combination of tough talk and 35 years of Senate experience made him Barack Obama's VP pick for the 2008 presidential campaign. What are his goals for the vice presidency? See more »

Sen. John McCain is a retired Navy veteran, a supporter of the war in Iraq and the Republican Party's nominee for president. What is his past voting record, and what will he do if he's elected? See more »

King Arthur means knights, swords in stones, ladies in lakes -- and Monty Python. Who was the real King Arthur? Did Camelot exist? See more »