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https://nyadagbladet.se/vetenskap/neandertalare-tros-ha-vardat-barn-med-downs-syndrom/attachment/cova-negra-spanien/
https://commons.wikimedia.org/wiki/File:0.1._Cova_Negra_(serra_Falconera,_Safor,_Pa%C3%ADs_Valenci%C3%A0).jpg