Tens of millions of years ago, plate tectonics set North and South America on an unavoidable collision course that would change the face of the Earth and spell life or death for thousands of species. Juan D. Carrillo explains the massive...

A collection of links to activities and lessons that could be used for Earth science concepts including the foil record, creating a timeline of Earth's history, plate tectonics, dinosaurs, and the progression of life on Earth.