Did you know the rocks along Lake Superior are basically Earth’s billion-year-old diary? Scientists just found out these stones recorded a wild tectonic collision that helped form the supercontinent Rodinia. Turns out, North America’s ancient core (Laurentia) once zipped south at record speed before slamming into another continent, then slowed way down—like, tectonic traffic jam! These findings are helping fill in the missing pages of our planet’s early history. Mind = blown! #Science #Geology #LakeSuperior