视频简介
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 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...。该季本应在2020年9月首映，但由于新冠病毒因素，世界范围的旅行限制，斐济对非公民关闭了边境，最终推迟在2021年春季，制作被搁置了整整一年。本季于2021年9月22日在美国哥伦比亚广播公司（CBS）和加拿大环球电视台（Global）首映。与往季不同，通常39天的赛制被缩短到26天。。A tectonic shift deep below the Mariana Trench causes a series of ever escalating earthquakes. If a team of leading seismologists fails to stop the disaster, the events will break apart the Earth, resulting in billions of casualties.。