Topics include: discovery of Sudbury impact event debris in Michigan; climate change and dispersal of early modern humans out of Africa; relationship of mantle plumes and supercontinent cycles; relationship of San Andreas fault system activity and the eastern California shear zone; and ramifications of sediment mixing in studying the Great Barrier Reef. An open-access Research Focus on paleoseismology addresses earthquake prediction. The GSA TODAY science article examines climate change, Ethiopian Plateau development, and human evolution.