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汉娜·弗莱揭开现代世界神奇科技背后的秘密，揭示这些发明背后令人叹为观止的故事。第一集：银行卡 汉娜·弗莱带你了解银行卡。这张不起眼的塑料卡常常被人们视为理所当然，但它却是获取现金的数字钥匙，蕴含着非凡

In advance of the D-Day Landings, paratroopers from the US 82nd Airborne Division are dropped behind

As the Kalahari Desert faces a worsening dry season, prides, packs and herds of all kinds must rely