Recreational marijuana: is Chicago ready for its legalization this week? A look at the top science stories of 2019. And a local pianist who’s still going strong at age 102.

• Pot Dispensaries Make Final Preparations for Recreational Sales
• Year in Review: The Top Science Stories of 2019
• 2019 Words of the Year Reflect Changing Attitudes, Awareness
• As Bears Season Ends, Team Looks Ahead to Future
• At 102, This Longtime Chicago Pianist Has Still Got the Chops
• ‘Entertaining Chicago’ Revisits City’s Classic Nightspots