Last year I showed a couple of documentaries from National Geographic about the discovery and exploration of ancient caves in Mustang, which lies along a corrider running through Nepal to Tibet.
The corrider follows the course of the Kali Gandaki river which runs southward from Tibet and cuts a course between some of the highest mountains in the world.
In these episodes of National Geographic Live! three of the participants in the making of the documentaries, the expedition leader, the scientist and photographer discuss what making these films meant for them.
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