A look at some noteworthy television this week: Art in the Twenty-First Century (Sunday, 10:00 p.m., WNET 13) Four artists - Robert Adams, Mark Dion , Iñigo Manglano-Ovalle Ursula von Rydingsvard – who explore the intersection between nature and culture. Billy Crystal: The Mark Twain Prize (Monday & Thursday, 9:00 p.m., WNET 13; Saturday, 7:30 p.m. WLIW 21) Billy Crystal receives the tenth annual Mark Twain Prize for American Humor at the Kennedy Center in......

A look at some noteworthy (and mainly regifted) programs this week: Yule Log (WPIX 11, Monday, 9:00 a.m.) The classic Yule log returns another year on WPIX. This being the 40th Anniversary of the log, channel 11 offers up a one hour special on history at noon, right after this year's showing. If you don't want to wait, they even offer a portable Yule Log for your iPod and The Yule Log.com fan site has......

A look at some noteworthy programs this week: Theater Talk: Prime-Time Spectacular (WNET 13, Sunday, 10:30 p.m.) This Broadway interview show celebrates its 10th anniversary with an hour long prime time special. Lincoln Center Tree Lighting 2006 (WABC 7, Monday, 5:00 p.m.) Channel 7 gives over a good chunk of their 5 p.m.newscast to this annual tree lighting. Expect some Disney corporate synergy in any performances. A Charlie Brown Christmas (WABC 7, Tuesday, 8:00 p.m.)......

Comedy Legends Live: The inimitable Carl Reiner speaks with Curb Your Enthusiasm’s Susie Essman. Reiner—comedian, actor, novelist and director— was a creator, writer and producer for The Dick Van Dyke Show. In 1999, he was awarded the Mark Twain Prize for American Humor by the Kennedy Center and was inducted into the Television Hall of Fame. Come check out a legend. Tonight // 8:15pm // Kaufmann Concert Hall [ Lexington Avenue at 92nd St] //......

The National Historical Trust announced the eleven most endangered historic places in America and one of them was in New York: 2 Columbus Circle, that weird looking building south of Columbus Circle. The Historic Trust admits that the design is "controversial," calling it a "nationally recognized icon of the Modern Movement," with "a marble skin, porthole windows and a street-level arcade that critics have likened to a row of lollipops, the unorthodox building is radically......