人们神秘消失的原因千奇百怪。
考古发现克伦·维斯文化在12900年以前神秘消失。
The Clovis culture disappears dramatically from the archaeological record 12,900 years ago.
根据影片，在古墓里发现两颗铁钉，一颗在地上，另一颗钉在尸骨上，然而不久后便神秘消失。
Two iron nails were found in the tomb, one on the ground and one actually inside an ossuary, and, according to the film, mysteriously disappeared shortly after.
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