"Wild, in the heart of the human zoo" - For more than a century, from 1810 to 1940, men have exhibited other men by presenting them as savages or monsters. More than a billion and a half visitors came to observe 35,000 exhibited around the world. They are called Little Capeline, Patagonian fuégienne, Tambo, aboriginal of Australia, Moliko, Kalina of Guyana, Ota Benga, Pygmy of Congo, Jean Thiam, Wolof of Senegal, Marius Kaloïe, Kanak of New Caledonia. —Ulf Kjell Gür

Mosses have colonised almost every corner of the earth’s surface. Evolving from oceanic algae that emerged onto the land 450 million years ago, these very first terrestrial plants became one of the main sources of oxygen for our evolving planet, helping to transform it from an arid rock into a lush world. This documentary travels to some of the most beautiful moss-covered landscapes in the world, including Japan, Iceland, France and Denmark, to meet the experts investigating its astonishing properties and potential. Science is only beginning to understand the secrets and possibilities of these remarkable plants.