Grzegorz Niedźwiedzki of Warsaw University co-authored a study on 395-million-year-old tetrapod footprints found in Poland.
Notes on verification
Confirmed by the original Nature paper, PubMed record, and independent journalistic sources (Earth Magazine, CNN) corroborating authorship and affiliation.
Sources
- Oldest Land-Walker Tracks Found--Pushes Back Evolution (nationalgeographic.com)
- https://www.cnn.com/2010/WORLD/europe/01/07/tetrapods.poland.evolution.discovery/index.html (cnn.com)
- https://www.nature.com/articles/nature08623 (nature.com)
- https://www.earthmagazine.org/article/tetrapod-tracks-reset-timing-four-legged-evolution/ (earthmagazine.org)
- https://pubmed.ncbi.nlm.nih.gov/20054388/ (pubmed.ncbi.nlm.nih.gov)