Santa's lost a reindeer, and Ms. O is on the *gasp* Naughty List?! Something VERY odd has happened, indeed. Tune in to ODD SQUAD Thursday, 12/13 as Otto and Olive save Christmas on PBS KIDS (check local listings). | Fred Rogers Productions

When it comes to being at home in Alaska’s winter landscape, caribou (Rangifer tarandus) are pretty chill. Alaska has 32 distinct caribou herds, and you have a chance of seeing these hooved critters in almost all of Alaska’s 16 national wildlife refuges. Bull caribou drop their antlers in November, while pregnant females keep their antlers until their calves are born in May, meaning Santa’s reindeer, which are essentially the same species, are all female! Caribou bodies are incredibly well adapt

Les grandes migrations de rennes (Rangifer tarandus) ne prévoient pas de pause et ce petit renne l'apprend à ses dépens... | Nat Geo Wild France