Photo of the Day: Run, run, reindeer! Even young reindeer calves can move quickly over long distances. Full-grown reindeer speeds top out at a steady 50 mph. . Happy holidays from all of us at Discovery! . . . #POTD #photooftheday #picoftheday #reindeer #babyanimal #cuteanimals #christmas #merrychristmas #santa #santasreindeer #wildlife #wildlifephotography #nature #naturephotography #animalfacts