Illustration of Asteroxylon Swamp
Arcadia Street: Original Media by Walter Myers
www.arcadiastreet.com
Sci Teck Daily
https://scitechdaily.com/400-million-year-old-fossils-reveal-how-the-first-roots-evolved/
Asteroxylon Fossil
Scientific Web Blog
www.scientific-web.com
Reconstruction of Asteroxylon
University of Aberdeen
www.abdn.ac.uk
