The Magical World of Moss • 2023

126:27

At the heart of the US-Canada border sit The Great Lakes - the world's largest freshwater ecosystem, containing as much as one fifth of the planet's supply. Chapter 1: Source to Sea The water's journey from source to sea spans half a continent - 2,000 miles - and takes more than three centuries to complete. This first of three documentaries charts the feature and its surrounding flora and fauna, showing how beavers, wolves, loons, moose help shape this incredibly vast watershed. Chapter 2: The Big Freeze s winter descends on The Great Lakes, life must contend with the return of the ice that carved this immense watershed thousands of year ago. A polar vortex paralyses fish and ducks and attracts hundreds of bald eagles. Wolves hunt deer trapped by ice, but are manipulated by ravens. Chapter 3: Marvels and Mysteries The spring thaw in America's Great Lakes creates ice tsunamis. Photosynthetic salamanders, fishing wolves, deep-diving moose, baby rattlesnakes and colourful fish hunting mid-air all illustrate unique adaptations to to the warmer, brighter season.

2022 • Nature

53:45

The next programme explores the various sea-living invertebrates. In Morocco, the limestones are 600 million years old, and contain many invertebrate fossils. They fall broadly into three categories: shells, crinoids and segmented shells. The evolution of shelled creatures is demonstrated with the flatworm, which eventually changed its body shape when burrowing became a necessity for either food or safety. It then evolved shielded tentacles and the casings eventually enveloped the entire body: these creatures are the brachiopods. The most successful shelled animals are the molluscs, of which there are some 80,000 different species.

2/13 • Life on Earth • 1979 • Nature

58:08

A film following a young meerkat queen living in the harsh beauty of the Makgadikgadi salt pans. If her new pups are to survive, she must unite her family in the face of rivals, predators and immense dust storms.

S1E6 • Dynasties • 2020 • Nature

58:36

Series following an expedition to search for tigers in the Himalayas. The team leaves base camp to track down tigers. Kayaker Steve Backshall heads to Bhutan's eastern jungles.

S1E2 • Lost Land of the Tiger • 2010 • Nature

59:00

Across the world we are seeing the emergence of bacteria that have gone rogue. These are the superbugs, dangerous bacteria that are becoming resistant to our only defence: antibiotics. Horizon meets the scientists who are tracking the spread of these potential killers around the globe, and discovers the new techniques researchers are developing to help defeat these superbugs.

Nature

22:20

Plants and animals have some curious super senses that enable them to see, hear and feel things that are quite invisible to us.

S2E6 • Natural Curiosities • Nature