The Zamiaceae are often considered 'living fossils', but a close study of how they have evolved over millions of years can give a glimpse into the lives of past plants.
You can can the post at https://www.botany.one/2021/11/piecing-together-the-zamiaceae-family-tree-reveals-the-evolution-of-how-plants-breathe/
You can read the original research at https://doi.org/10.1093/aob/mcab095