The power structure in the Arab Empire

Around 700 AD, the Arabs ruled over about 60 million people. At the head of the empires there was a caliph. Right below were the governors of the provinces, who primarily collected taxes. Author: ZDF/Terra X/Gruppe 5/ Susanne Utzt, Sahar Eslah, Martin Carazo Mendez/ Martin Christ, Marc Riemer, Joachim C. Seck/ Igor Garbuzenko, Ramin Sabeti,/ Faber Courtial, Jörg Courtial/Gruppe 5 FX, xkopp creative Translation and dubbing: alugha Click here to see more videos: https://alugha.com/TerraX

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Structure and function of a giraffe neck

A giraffe's neck is up to 2.50 meters long, weighs around 250 kilograms and is held in place by only one tendon and seven cervical vertebras. It is a particular challenge to the vascular system when the giraffe bends its head down to drink. Author: ZDF/Terra X/R.Marel/C.Gerisch/SpiegelTV/Jochen Sch

Environmental impact of cruise ships

NABU has calculated that one cruise ship produces more sulfur dioxide per day than 300 million cars. The particulate matter pollution is equivalent to about one million cars. In addition, one cruise ship produces more carbon dioxide per day than 80,000 cars. On top of that, in many ports there is no

What does a Federal Chancellor do?

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