交换货币从最早的铁棒到卡卡豆不等。然而，历史上使用最广泛的货币是货贝。在中国早期，它甚至被作为官方储备货币。 作者：Gruppe5 /Sabine Klauser/Sebastian Martinez 翻译和配音 : alugha 点击这里查看更多视频：https://alugha.com/TerraX
In 1977, NASA's Voyager 2 space probe began its journey to the planets of our solar system. But the probe also provides clues about the solar system beyond the planets. Author: ZDF/Terra X/C. Haak/A.M. Wendlandt, Nikolai Holzach Translation and redub: alugha Click here to see more videos: https:
Air pollution has many causes. The biggest polluter is energy production, with two-thirds of particulate emissions coming from coal-fired power plants. Road traffic and factory farming in agriculture also contribute to this. Author: 3sat/nano/Labo M/Johan von Mirbach/Chris Caliman/Christoph Valenti
There are probably 100 million different types of viruses. Their attacks always follow the same pattern. The viruses attach to a cell, transfer their genetic material and force the host cells to produce new viruses. Author: 3sat/nano/Docstation/Johan von Mirbach/Anna Grün/Riccardo Giese/Nico Schleg
