A grammatical problem that has defeated Sanskrit scholars since the 5th century BC has finally been solved by an Indian Ph.D. student at the University of Cambridge. Rishi Rajpopat made the breakthrough by decoding a rule taught by "the father of linguistics," Pāṇini.
source https://www.lifetechnology.com/blogs/life-technology-science-news/ancient-grammatical-puzzle-solved-after-2-500-years