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<p>[QUOTE=&quot;Jochen1, post: 3459085, member: 103829&quot;]Dear ominus1!</p><p><br /></p><p>Thank you for your post. From Wikipedia:</p><p><br /></p><p>&quot;In 2018 the German volcano biologist Hardy Panz from the University of Duisburg-Essen published a study in which he proves that in the morning and evening hours carbon dioxide accumulates near the ground of the shrine, which are deadly for animals that cannot keep their heads high enough. The priests of the time knew the effect and could both use it and protect themselves from it by holding their head up or climbing a stone.&quot;</p><p><br /></p><p>From Colin Barras: <i><a href="http://www.sciencemag.org/news/2018/02/roman-gate-hell-killed-its-victims-cloud-deadly-carbon-dioxide" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.sciencemag.org/news/2018/02/roman-gate-hell-killed-its-victims-cloud-deadly-carbon-dioxide" rel="nofollow">This Roman ‘gate to hell’ killed its victims with a cloud of deadly carbon dioxide</a></i>. In: <a href="https://de.wikipedia.org/wiki/Science" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://de.wikipedia.org/wiki/Science" rel="nofollow">Sciencemag.org</a>, 16. Februar 2018</p><p><br /></p><p>Best regards[/QUOTE]</p><p><br /></p>

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