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Marlon Brando dreamed of turning the Tetiaroa atoll in French Polynesia into a natural sanctuary open to scientists. This ecological project has been ongoing since the actor's death in 2004.

How do researchers observe the physical forces at work on the Sun's surface? Can we recreate in the laboratory the nuclear fusion that takes place at its heart? What would be the impact of a major solar storm on the power grids of an interconnected world? With astrophysicists, nuclear energy researchers, historians of science, artists and hunters of the aurora borealis - a phenomenon caused by the entry of particles from the solar wind into the Earth's atmosphere - this documentary sets out to discover a star that has been a symbol of life since the dawn of humanity.

Their names were Herta, Liesel, Liselotte and Hildegard: Hundreds of thousands of women, including secretaries, nurses, housewives and concentration camp guards, put themselves in the service of Nazi ideology in the German-occupied areas from 1939 onwards. The women were not passive witnesses to a genocide committed by men, but active accomplices and murderers. In the history of the Second World War, the role of women was often only marginally recognized. Around 500,000 of them were active in the areas occupied by the Wehrmacht from 1939 - where the Holocaust was actually implemented.

More than 70 years ago, the Kiel gynecologist Carl Clauberg tried to sterilize hundreds of girls and women in the German concentration camp Auschwitz-Birkenau on behalf of SS Reichsführer Heinrich Himmler. Many died as a result of the inhuman experiments. The last survivors tell of the terrible experiences they had in the camp.

From "The Little Mermaid" to "The Snow Queen", Hans Christian Andersen has left behind a rich collection of stories tinged with magic, but also with tragedy, which have kept a place of honor, from generation to generation, in children's libraries and the collective imagination. At the antipodes of the Grimm brothers' optimistic folk tales, the melancholy of his stories, sometimes crowned with a desperate end, speaks true to children and their parents alike. His tales, whose contemporary popularity also owes much to Disney, earned him immense fame from his maturity, beyond the borders of his native Denmark, even if the rest of his work (he was also a playwright, poet, novelist and short story writer) was hardly successful.

Coming from the upper industrial bourgeoisie of Wuppertal, the young Friedrich Engels much preferred philosophy and politics to business. Having observed in the family textile factories, especially in Manchester, the appalling living conditions of the workers, he theorizes the relations between bourgeoisie and proletariat by relying on the Hegelian dialectic, studied in Berlin. The meeting in 1844 with Karl Marx, whose ideas he shared, sealed an indelible friendship, punctuated by travels, and an intellectual collaboration among the most fruitful in history. From the "Manifesto of the Communist Party" to "Capital", of which Engels will rework and publish the last volumes after the death of his friend, their two names will remain inseparable.

A newly discovered 500-year-old wreck offers vital clues to the evolution in ship design that made long-distance voyages practical.

Pyramiden zählen zu den ältesten Bauwerken der Menschheit. Die geometrische Form findet sich in vielen Kulturen weltweit. Harald Lesch erkundet die Geheimnisse hinter den Monumentalbauten.