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视频简介

2016年夏天，洞穴探险家孙克宁带领一支探险队来到重庆市奉节县回龙村的迷宫河峡谷。他们此行的目的地是峡谷深处那座开在绝壁半空中的巨大洞穴。村里老人代代相传，这座洞穴曾是古人熬制硝盐之所。因此，村民们都把这座洞穴称为盐硝洞，但如今，村民中却没有一个人真正进入过这座洞穴。。In this spectacular series, Professor Cox offers an original new perspective on human life: the story of a group of apes that evolved to leave their home planet and step out into the universe. Humans are curious creatures. Of all the species on Earth, we alone ask questions. This series tackles the greatest questions we've ever asked. Where are we in the universe? Why are we he...。