{"id":14502,"date":"2019-12-02T17:08:28","date_gmt":"2019-12-02T17:08:28","guid":{"rendered":"http:\/\/www.wjst.de\/blog\/?p=14502"},"modified":"2024-09-20T14:49:49","modified_gmt":"2024-09-20T12:49:49","slug":"is-the-loomis-hypothesis-wrong","status":"publish","type":"post","link":"https:\/\/www.wjst.de\/blog\/sciencesurf\/2019\/12\/is-the-loomis-hypothesis-wrong\/","title":{"rendered":"Is the Loomis Hypothesis wrong?"},"content":{"rendered":"

I remember an old vitamin D book – I believe it was Feldman’s Vitamin D<\/a> – that argues that if we are going down the Transsahara Route (Algier-Lagos) human skin color gets always darker towards Tamanrasset due to increased solar power- also known known as the\u00a0 Loomis hypothesis (Science 1967<\/a>).<\/p>\n

 <\/p>\n

So , let’s have a look at three maps. Solar power first.<\/p>\n

\"\"<\/a>
1. Solar power. Source: https:\/\/upload.wikimedia.org\/wikipedia\/commons\/1\/1e\/Global_Map_of_Global_Horizontal_Radiation.png<\/figcaption><\/figure>\n

 <\/p>\n

Second, skin tones – the Tamanrasset observation is correct but the overall picture does not match the Loomis hypothesis.<\/p>\n

\"\"<\/a>
2. Skin tone. Source https:\/\/science.sciencemag.org\/content\/358\/6365\/867.full For full details see the original paper<\/figcaption><\/figure>\n

 <\/p>\n

Neither does the new vitamin D map<\/a> published last week in the Lancet.<\/p>\n

\"\"<\/a>
3. Vitamin D map. Source: https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S2214109X19304577 For full details see the original paper<\/figcaption><\/figure>\n

 <\/p>\n

No need to calculate any formal correlation coefficient. – maps are patchy but let me conclude that either the vitamin D data or the Loomis hypothesis is wrong.<\/p>\n\n

 <\/p>\n

\n CC-BY-NC Science Surf , accessed 10.04.2026<\/span>\n <\/div>","protected":false},"excerpt":{"rendered":"

I remember an old vitamin D book – I believe it was Feldman’s Vitamin D – that argues that if we are going down the Transsahara Route (Algier-Lagos) human skin color gets always darker towards Tamanrasset due to increased solar power- also known known as the\u00a0 Loomis hypothesis (Science 1967).   So , let’s have … Continue reading Is the Loomis Hypothesis wrong?<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,10],"tags":[3307,3306,1287],"class_list":["post-14502","post","type-post","status-publish","format-standard","hentry","category-genetics-biology","category-sunshine-vitamin","tag-loomis-hypothese","tag-skin-tone","tag-vitamin-d"],"_links":{"self":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/14502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/comments?post=14502"}],"version-history":[{"count":13,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/14502\/revisions"}],"predecessor-version":[{"id":24075,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/14502\/revisions\/24075"}],"wp:attachment":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/media?parent=14502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/categories?post=14502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/tags?post=14502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}