Figure 6. Reconstruction of theropods engaged in scrape ceremony display activity, based on trace fossil evidence from the Dakota Sandstone, Colorado.
Artwork and graphics coordination by Xing Lida.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.