One day in 2011, undergraduate student Naomi Martisius was sorting through tiny bone remnants in the University of California, Davis, paleoanthropology lab when she stumbled across a peculiar piece.
The bone fragment, from a French archaeological site, turned out to be a part of an early specialized bone tool used by a Neandertal before the first modern humans appeared in Europe.
"At the time, I had no idea about the impact of my discovery," said Martisius, who is now pursuing her doctoral degree in anthropology at UC Davis.