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Hannah Fry, a professor of maths, is used to investigating the world around her through numbers. Whe

A series that looks into three of Earth's major rivers.

探索令人惊叹又危机四伏的地中海，叹为观止的野生动物已经适应并实现了长期生存——直至今日。地中海承受着来自人类的巨大压力，而生命得以在此繁衍生息的秘密是什么？人类如何能保护这些濒危的生态系统？本片发掘动