Horizon looks at dark energy - the mysterious force that is unexpectedly causing the universe's expansion to speed up. The effects of dark energy were discovered in 1998 but physicists still don't know what it is. Worse, its very existence calls into question Albert Einstein's general theory of relativity - the cornerstone of modern physics. The hunt for the identity of dark en...

《地平线系列：神秘的暗能量》是一部2016年上映的英国纪录片， 由马克·雷迪斯执导，主演塔姆辛·格雷格，当前正在播放第集。