Changes to the bacteria that live inside all of us are responsible for increasing the number of people with allergies, suggests new research. 　　In this episode of Horizon, the show investigates this claim by conducting a unique experiment with two allergic families in order to find out just what it is in the modern world that is to blame. With a raft of mini cameras, GPS units an...

The dream of sending humans to Mars is closer than ever before. In fact, many scientists think that the first person to set foot on the Red Planet is alive today. But where should the first explorers visit when they get there? 　　Horizon has gathered the world's leading experts on Mars and asked them: where would they go, if they got the chance - and what would they need to surviv...

　　接吻地面（简称）是一部纪录片，探索了第一个可行的，低成本的方式来扭转气候变化通过（鼓卷）。。。土壤。如果处理得当，土壤（亦称“泥土”）有可能将人类排放到大气中的大部分二氧化碳封存起来。只有一个问题：我们现代的、工业化的、以单作物为基础的农业正在杀死土壤中的微生物，而这些微生物是进行碳封存的（“生物测定”）。但还有希望。一个由科学家、农民、牧场主、活动家和政府机构组成的激进组织正联合起来，在全球范围内开展一场新型农业运动，称之为“再生农业”，这种农业可以增加土壤寿命、储存水和封存二氧化碳。这些人来自不同的背景，但他们有一个共同的承诺——在太迟之前治愈世界的土壤。亲吻地面是一个强大的解决人类最大挑战之一的故事。

　　社会题材纪录片《油泵危机》聚焦美国由于汽车消费文化，以及由此产生的石油依赖，也试图提出解决方案。