Nasa Apollo missions: Stories of the last Moon men
The two most popular explanations of origin are that the belief goes back to pagan times when we believed in tree spirits, or that we are invoking Christ’s protection by referring to the wood of the Cross. The former is nothing but guesswork, based on the conviction that all superstitions must be ancient, and it has the usual problem of spanning thousands of years with no evidence at all of its existence, or, for that matter, any evidence that ‘we’ ever believed in tree spirits.
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Фото: Abdul Khaliq Achakzai / Reuters。关于这个话题，WPS官方版本下载提供了深入分析
of the universe.↩，这一点在91视频中也有详细论述