The authors see several possible explanations.
"Perhaps the most obvious is that this is the result of adaptation to the reduced level of sunlight in northern latitudes," says Professor Mark Thomas of UCL, corresponding author of the study.
www.uni-mainz.deDie Autoren sehen hierfür mehrere Erklärungsmöglichkeiten :
"Die naheliegendste ist die Anpassung an die verminderte Sonneneinstrahlung im Norden", so Prof. Mark Thomas vom University College in London, Korrespondenzautor der Studie.
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