NMRl7VPBj8U birds-of-passage-a-secret-journey-through-the-skies Birds of Passage | A Secret Journey Through the Skies For the first time ever, explore unprecedented migratory travels! Every year, millions of migratory birds make their epic journey across Europe. Heading south in the fall, north in the spring, recently there have been fewer birds in our skies. Some species have even vanished entirely. What could be discouraging them from flying over our lands? uM51_Vui9tA pbs-eons-are-giant-animals-inevitable PBS Eons | Are Giant Animals Inevitable? The journey the thunder beasts took to reach such mega proportions from such humble beginnings forces us to ask an important question, one that paleontologists have been asking for more than a century: from an evolutionary perspective, is bigger always better? 2dc_yuyURqQ arctic-and-antarctic-polar-world-emerging-wildlife Arctic and Antarctic | Polar World: Emerging Wildlife The Polar regions are the biggest wildernesses on earth, vast tracks of snow and ice. A perpetual winter wonderland. ES5_nqeThR4 real-science-natures-wildest-weapons Real Science | Nature's Wildest Weapons Credits: Narrator/Writer: Stephanie Sammann Writer: Lorraine Boissoneault Editor: Dylan Hennessy 5s622p9XhY0 this-is-the-biggest-creature-in-the-entire-history-of-the-earth This is the Biggest Creature in the Entire History of the Earth There’s a large number of different creatures living in this world. Some of these animals are very small and some are truly big. J3dYjV1wqV0 australia-landscapes-and-nature-tasmania Australia Landscapes and Nature | Tasmania Separated from Australia’s mainland 12,000 years ago, Tasmania is unlike any part of Australia. le6sVSGMe_k scotland-highlands-and-islands Scotland | Highlands and Islands Mysterious castles overlooking lonely lakes and men in kilts playing the bagpipes - Scotland's cliches are beloved and well known. NMRl7VPBj8U birds-of-passage-a-secret-journey-through-the-skies Birds of Passage | A Secret Journey Through the Skies For the first time ever, explore unprecedented migratory travels! Every year, millions of migratory birds make their epic journey across Europe. Heading south in the fall, north in the spring, recently there have been fewer birds in our skies. Some species have even vanished entirely. What could be discouraging them from flying over our lands? MmVP0dIgG6Y eagles-hunters-of-the-sky Eagles | Hunters of the Sky Whether in Alaska or in the Dolomites, eagles are generally seen as Kings of the skies. This film devotes itself on the one hand to the bald eagle, the heraldic bird of the United States, and on the other, the Golden Eagle, Europe's largest predatory bird mfYuvlE78Nk nat-geo-wild-pterosaurs-101 Nat Geo Wild | Pterosaurs 101 Pterosaurs were the first vertebrates to take to the skies. Learn about the anatomical features that made their flight possible, how large some of these creatures grew, and which species was named after a vampire legend. G4Ty4LpCdqc evolution-the-evolution-of-flight Evolution | The Evolution of Flight How did the very first vertebrate flyer the, the pterosaur, escape it's earthly bounds 220 million years ago. This creature eventually evolved into flying goliath the size of small planes.