12/25/2017: What incandescent light, an Alaskan wildlife refuge and pennies have in common

Summary: They're considered inefficient, under-utilized and useless, respectively, and all face uncertain futures. Incandescent light bulbs will no longer be available to purchase in California beginning in 2018; instead, Californians will buy compact florescent lights and LED bulbs, which have triple the energy efficiency. Alaska's Arctic National Wildlife Refuge could lose 1.5 million acres to energy developers, due to a mandate in the new tax bill. And even though you can't buy anything for a penny anymore, the coin may stay in circulation despite calls to get rid of it once and for all. Plus, on this Christmas Day, we revisit the story of Santa's little surveillance helper, the elf on the shelf.