Themes for the All-Purpose Question Everything Challenge, running Monday through Friday from 8:00am to 6:00pm PST.

• Monday - City of Angels: Some say Irving Berlin composed "White Christmas" while working in wintry Los Angeles. We thought now was as good a time as any to peel back Tinseltown's curtain and see what's back there.
• Tuesday - Lights! Camera! Tagline!: Of course, it's hard to separate LA from its most famous product: the movies. Can identify the films behind these 10 ad taglines?
• Wednesday - Shaken & Stirred: There's some real history inside every cocktail shaker. Today's trivia deals with potent potables and the things we make with them.
• Thursday - Flight of the Humans: 106 years ago today, the Wright Brothers successfully took to the air. See how much you know about man's forays into the sky.
• Friday - Easy Bein' Green: Here's ten things that were "green" before the environment took their spotlight.