As temperatures plunged on the mountainside to -17 Denham said he built a small cave to shelter from the freezing weather and the powder snow blowing across the mountain.

当时山上气温降至零下17摄氏度，德纳姆按照格里尔斯在节目中教的那样，搭建小洞穴躲避风雪和酷寒。

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The entrance should also be lower than the main chamber to prevent winds from blowing into the cave.

正对着坡面挖三英尺深，入口要比主室低防止风吹进主室去。

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When Stone Age man produced their remarkable cave paintings they often left handprints on the walls produced by blowing pigments from one hand through a tube held by the other hand.

BBC: Cave handprint, Montpellier University