是什么让人们保持健康？
哈佛大学的一项长期研究得出了核心发现：良好的社交关系对于保持身心健康至关重要。 作者：zdf/Terra X/C. Schrader/F. Siegwart/Materia viva/Maximilian Mohr 翻译和配音：alugha 点击这里观看更多视频：https://alugha.com/TerraX
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Formation of the Baltic Sea
20,000 years ago, the Baltic Sea region was still covered by a glacier. A change in climate caused the glacial ice to melt. The first form of the Baltic Sea emerged: a freshwater lake. Today, despite its connection to the North Sea, it is considered an inland sea. Author: ZDF/Terra X/Nina Zorn/Anna
