That's what an international team of researchers led by Professor Xiao-Ming Liu (University of North Carolina, Earth, Marine and Environmental Sciences), her PhD student Cheng Cao (now postdoctoral fellow, Nanjing University) and her former postdoctoral scholar Clément P. Bataille (now Associate Professor, Earth and Environmental Sciences at the University of Ottawa), investigated over a six-year span. Their findings are published today in Nature Geosciences. Where the understudy takes on a lead role