hairymuseummatt (original photo), DrMikeBaxter (derivative work) published on 20 March 2017
Skulls of Homo sapiens (left) and Neanderthal (right) from the Cleveland Museum of Natural History. This derivative work shows the skulls from the original display on a plain black background and with the annotation removed.
Based on Wikipedia content that has been reviewed, edited, and republished.
Original image by hairymuseummatt (original photo), DrMikeBaxter (derivative work). Uploaded by Emma Groeneveld, published on 20 March 2017 under the following license: Creative Commons: Attribution-ShareAlike. This license lets others remix, tweak, and build upon your work even for commercial reasons, as long as they credit you and license their new creations under the identical terms.