https://phys.org/news/2020-10-giant-lizards-learnt-millions-years.html?fbclid=IwAR1QVtoiNraBjhR0co0ae7Ajt9UxfBkjtIqwrLQMYhmCEr_XQlqFN5pW4VE
Scientific journal: 150 million years of sustained increase in pterosaur flight efficiency, Nature (2020). DOI: 10.1038/s41586-020-2858-8 , www.nature.com/articles/s41586-020-2858-8