In recent years geologists have hotly debated the age of the Grand Canyon. Some think it's young (just 6 million years old), while others argue that it dates back 70 million years — to the days of dinosaurs.
Now one group says the Grand Canyon is neither young nor old. Instead, these geologists say, it's both.
Musician Clarence Clearwater, like so many Navajos, has moved off the reservation for work. He performs on the Grand Canyon Railway, the lone Indian among dozens of cowboys and train robbers entertaining tourists.
"I always tell people I'm there to temper the cowboys," says Clearwater. "I'm there to give people the knowledge that there was more of the West than just cowboys."
Federal Reserve Chairman Ben Bernanke will preside over his last Fed policy-making meeting on Tuesday and Wednesday. On Saturday morning, the first woman ever to lead the nation's central bank, Janet Yellen, will take over.
There's no doubt that during his two terms as chairman, Bernanke faced a challenge unlike any Fed chairman since the Great Depression: a global financial crisis that threatened to become financial Armageddon and followed by a deep recession.
Bernanke talked about how he survived it all during an appearance at the Brookings Institution recently.