This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Juvenile and adult Triceratops skulls. Casts of fossilized en Triceratops skulls juvenenile and adult exhibited at the temporary Howard st location of the California Academy of Sciences Image by en User Leonard en Leonard en FunkMonk original upload log page en TriceratopsYoungAndAdultSkulls Leonard bytes en Triceratopsen