National Geographic--Waiting for a package? The holiday shipping countdown has begun: Online retailers are issuing regular reminders of how many days are left to order for delivery by Christmas, while shippers such as UPS and FedEx are scrambling to distribute record volumes of parcels from all of that e-commerce. Dubbing this “Peak Week,” UPS said it would deliver 29 million packages Tuesday, a single-day company record; FedEx saw its peak day, also a company record, on December 2 with 22 million shipments. Read more!