Two hundred fifty million years from now, geologists predict a supercontinent called Pangaea Ultima: a crushed, arid landmass with New York buried under rock and a climate too extreme for most mammals to survive. This film uses that speculative endpoint as a hook to explain the actual mechanics of plate tectonics, tracing how Earth's landmasses have repeatedly split apart and slammed back together over billions of years, from the earliest continents through Pangaea to the world we live on now. Geologists and animated diagrams walk through the forces driving this cycle, mantle convection, seafloor spreading, continental collision, and the evidence locked in rock strata that lets scientists reconstruct past supercontinents and model future ones. The film treats the 250-million-year prediction as a scientific extrapolation rather than fantasy, grounding it in the same processes that built the Himalayas and split the Atlantic. It closes by placing human timescales against geological ones, a reminder that the ground itself is a slow-moving, temporary arrangement.