Around the Nation

*Here are four arts and culture stories from public broadcasting partners around the nation.* In October 2007, a portrait of a young woman in Renaissance dress made headlines. Sold nine years before for around $20,000, the portrait is now thought to be an undiscovered painting by Leonardo da Vinci worth more than $100 million. NOVA's ["Mystery of a Masterpiece,"](http://www.pbs.org/wgbh/nova/tech/mystery-masterpiece.html) airing Wednesday, explores how imaging analysis help tie the portrait to da Vinci. Here's a preview:

Watch Mystery of a Masterpiece Preview on PBS. See more from NOVA.

[ Tavis Smiley](http://www.pbs.org/wnet/tavissmiley/) devotes Tuesday's show to the legacy of blues matriarch Etta James, who passed away Friday at the age of 73. Watch the full show here:

Watch Etta James Tribute on PBS. See more from Tavis Smiley.

NPR's ["All Things Considered" talks to Chris Raschka](http://www.npr.org/2012/01/23/145656652/caldecott-winner-chris-raschka-discusses-his-book), whose book, "A Ball for Daisy," won the American Library Association's Randolph Caldecott Medal for best illustrated story on Monday:

WHYY's ["Friday Arts"](http://www.whyy.org/tv12/fridayarts/index.html) profiles the West Philly-based NextFab studio, which offers members access to cutting-edge tools and equipment to create their designs:

Watch NextFab Studio on PBS. See more from Friday Arts.