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...
乔治·卢卡斯 特穆拉·莫里森 雷巴·布尔 杰米·布洛奇 Maureen Bullock 本·贝尔特 杜维因·邓纳姆 戴夫·菲洛尼 乔·庄斯顿 凯瑟琳·肯尼迪 丹尼尔·洛根 Steve Sansweet Pete Vilmur
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