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地平线之过敏症·现代生活和我 Horizon - Allergies: Modern Life and Me
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...
地平线系列：火星旅行者指南 Horizon: Mars - A Traveller's Guide
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...