Weekends on All Things Considered continues its "Why Music Matters" series with Olympic luger Christian Niccum. Niccum says music was the key to one of his first accomplishments in the sport.

"I was 15 years old, in Berchtesgaden in Germany," he says. "It's the oldest artificial luge track in the world, and it's also the most difficult."

Daunted by the course's many sharp turns, Niccum turned to something borrowed for inspiration.

When Michelle Obama's great-great-great grandmother was 8 years old, her life underwent a dramatic change.

Melvinia Shields was a slave who grew up at a South Carolina estate with a relatively large community of slaves she knew well. But then she was moved to a small farm in northern Georgia where she was one of only three slaves; most white people in the area didn't own any.

On a week monopolized by important political news, many of you still took time out to comment on our National Geographic inspired poll, which asked "Which president, would-be president or movie president would do the best job if extraterrestrials come to visit?"

Mark Dermul is a serious Star Wars fan. He was just 7 years old in 1977 when the original movie hit the theaters. As soon as the huge Star Destroyer flew across the opening scene, he was hooked.

"It hasn't left me," he says. At 42, Dermul now guides tours throughout North Africa, visiting sites that were featured in the blockbuster films.

On one 2010 trip back to planet Tatooine — OK, Tunisia — he and his tour group noticed that Luke Skywalker's boyhood home was decaying. They jumped into hyperspace — OK, the Internet — to save it.