简介：In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris and there is an increasing problem of satellit

简介：BBC纪录片《油糖陷阱》本片通过真人测试发现：单独吃糖或脂肪，短期内都可减轻体重；造成肥胖问题的根源是“糖油混合物”；不摄取糖分反而易得糖尿病

简介：Something weird seems to be happening to our weather - it appears to be getting more extreme. 　　In the past few years we have shivered through two re