Human skulls: three figures showing the skulls of an African, a Native American and a Chinese, seen from beneath. Stipple engraving, 1843.

Public Domain Mark

You can use this work for any purpose without restriction under copyright law. Read more about this licence.

Credit

Human skulls: three figures showing the skulls of an African, a Native American and a Chinese, seen from beneath. Stipple engraving, 1843. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.