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An orphaned dinosaur raised by lemurs joins an arduous trek to a sanctuary after a meteorite shower destroys his family home.

Antarctica, 106 million years B.C. In the Mid Cretaceous, Antarctica is much warmer than in modern times and covered in lush rain forests inhabited by dinosaurs like the tiny herbivore Leaellynasaura and by relics like the giant amphibian Koolasuchus. Some, like the predatory Allosaurus and giant herbivore Muttaburrasaurus, migrate from the warmer Australia in the summer. Leaellynasaura, however, hibernates during the winter, which is a cold, dark night lasting several months. This episode depicts one year in the life of a clan of Leaellynasaura plagued by territorial competition, egg thieves and predators.

Andrew takes a look at the lost rift valley that once existed between Australia and Antarctica in the cretaceous period. A place where dinosaurs and other creatures survived in floodplains and polar forests.

Prionosuchus is the largest amphibian ever know to exist but it is thought to have looked and behaved more like a crocodile than modern amphibians. It was a s big as a hefty crocodile so why not?

Amphibians arose in the Carboniferous period with some favoring a terrestrial environment while others remained aquatic but in both case growing to tremendous sizes. As the Earth became dryer during the Permian period large amphibians struggled in favor of animals with hard shelled eggs, such as Dimetrodon, that didn't require an aquatic environment. But amphibians made a resurgence in the wetter Triassic.

Loolasuchus was an amphibian and the last known temnospondyl to become extinct having survived the end Triassic extinction. It was well acclimated to colder climates which probably gave it an edge of crocodilians until climates warmed.

Antarctica sported lush forests that supported a variety of dinosaurs and other animals during the Cretaceous. But that doesn't mean winter was any fun.