https://www.bbc.co.uk/iplayer/episode/b0bb33ht/horizon-2018-3-how-to-build-a-time-machine Time travel is not forbidden by the laws of nature, but to build a time machine, we would need to understand more about those laws and how to subvert them than we do now. And every day, science does learn more. In this film Horizon meets the scientists working on the cutting edge of discov...
"Clean Eating"是欧美正在流行的趋势,新鲜、自然的食材能"清洁"身体,但事实果真如此吗,新陈代谢专家Giles Yeo博士深入调查。 Dr Giles Yeo investigates the latest diet craze and social media sensation - clean eating. Giles cooks with Ella Mills and sifts through the claims of the Hemsley sisters. http://www.bbc.co.uk/iplayer/episode/b08bhd29/horizon-20162017-18-clean-eating-the-dirty-truth#long-description