绝命派对美国

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 satellites mysteriously breaking down. With first-hand accounts from astronauts and experts, Horizon reveals the scale of the problem of space junk. Our planet is surrounded by hundreds of millions of pieces of junk moving at 17,000 miles...。德·凡·图卢肯博士调查兴奋剂的世界：从那些追求名声、荣耀、和有利可图的赞助商合同的职业运动员，到如今服用合成激素来增长肌肉和追求外貌的成千上万的普通英国人。这些都是些什么药物？它们对于人体会产生什么作用？。