Bilzingsleben
A look at the intentional markings of Homo erectus
Looking at a 2014 paper by Josephine Joordens and coworkers, which describes zig-zag markings on a shell from Trinil, Indonesia. This shell may have been intentionally marked by Homo erectus.
![Clam shell with zigzag markings in a museum exhibit](/content/images/size/w1460/2023/06/trinil-pseudodon-shell-engraved-markings-naturalis-henk-caspers-wikimedia-cc-by-sa.jpg)