Pangea itself won’t reassemble in its original configuration, but a new supercontinent almost certainly will. Earth’s continents have been merging and splitting apart in a repeating cycle for billions of years, and current plate movements point toward the next supercontinent forming roughly 200 to 300 million years from now. The question isn’t really whether it will happen, but how.
The Supercontinent Cycle
Pangea was not the first supercontinent, and it won’t be the last. Before Pangea consolidated around 300 million years ago, there was Rodinia (about 900 million years ago), Nuna (roughly 1.5 billion years ago), and possibly Kenorland (around 2.5 billion years ago). The pattern is remarkably consistent: continents drift together, fuse into a single massive landmass, then break apart and scatter, only to eventually reconverge. Each full cycle takes roughly 400 to 600 million years.
This cycle is driven by forces that reach all the way to Earth’s core. When a supercontinent sits in one place, the surrounding ocean floor slowly dives beneath it at subduction zones, forming a ring of sinking rock around the landmass. Over tens of millions of years, that sinking material reaches the boundary between Earth’s mantle and its core, nearly 3,000 kilometers down. There, it triggers massive columns of hot rock called mantle plumes to rise back up beneath the supercontinent. The heat from below, combined with the pulling forces along the edges, eventually tears the supercontinent apart. The pieces drift away, new ocean basins open between them, and the process of reassembly begins elsewhere.
Africa offers a real-time example of one stage in this cycle. It has sat in roughly the same position for about 200 million years since Pangea’s breakup, and the trapped mantle heat beneath it has caused the continent to rise roughly 400 meters higher than other continents. That slow uplift is a direct consequence of the thermal insulation supercontinents provide.
Four Competing Models for the Next Supercontinent
Geologists have proposed four main scenarios for how the next supercontinent could form. They differ based on which ocean basins close and which direction the continents travel.
- Pangaea Ultima (also called Pangaea Proxima): The Atlantic Ocean reverses course and closes, pulling the Americas back toward Europe and Africa. The result is a reformed, distorted version of Pangea in roughly the same location.
- Novopangaea: The Pacific Ocean continues shrinking until the Americas collide with Asia and Australia. This places the new supercontinent on the opposite side of the globe from where Pangea once sat.
- Amasia: The continents drift northward and gather around the North Pole, 90 degrees from Pangea’s original position. The Arctic Ocean closes as North America and Asia converge.
- Aurica: Both the Atlantic and Pacific close simultaneously while a new ocean opens across central Asia, splitting it apart. The continents then reassemble along the equator.
Which Scenario Is Most Likely?
Recent supercomputer simulations from Curtin University’s Earth Dynamics Research Group favor a Pacific-closing scenario. Their reasoning comes down to the age and thickness of the ocean floor. The Pacific Ocean is a remnant of the ancient Panthalassa superocean that began forming around 700 million years ago. Its floor is old, dense, and already heavily lined with subduction zones, the Ring of Fire being the most famous. It has been shrinking by a few centimeters per year since the time of the dinosaurs.
The Atlantic and Indian oceans, by contrast, are geologically young. They formed when Pangea broke apart, and their ocean floors are thicker and more buoyant. Because Earth has been gradually cooling for billions of years, the plates beneath younger oceans are stronger and more resistant to subduction. The simulations found it would be far easier for the next supercontinent to form by closing the ancient Pacific than by reversing the relatively young Atlantic. At its current width of about 10,000 kilometers and its current rate of shrinkage, the Pacific would take roughly 200 to 300 million years to close.
What the Next Supercontinent Would Look Like
Regardless of which model proves correct, the assembly process would dramatically reshape Earth’s surface. As ocean basins close, the sediments on the ocean floor get crumpled and thrust upward, building enormous mountain ranges along the collision zones. The Himalayas, formed by India’s collision with Asia, are a small preview of what happens when two landmasses meet. A supercontinent would feature multiple ranges of that scale or larger, marking the seams where former oceans disappeared.
Sea levels would drop significantly. Supercontinents sit high because the trapped heat beneath them causes the underlying mantle to expand and push the land upward. With less ocean ridge activity (since fewer oceans are spreading), the ocean basins deepen and water recedes from continental margins. The interior of the supercontinent would likely be extremely dry, far from any moisture source, similar to how central Asia is arid today but on a vastly larger scale.
A Hotter, Harsher World
The next supercontinent won’t just rearrange the map. It will likely transform Earth’s climate in ways that threaten most complex life. The sun grows brighter over time at a rate of about 0.8% per 100 million years, so 250 million years from now it will be pumping noticeably more energy onto the planet. That extra solar heat, combined with the effects of the supercontinent itself, creates a compounding problem.
A 2023 study published in Nature Geoscience modeled the climate of a future supercontinent called Pangaea Ultima and found alarming results. Background CO2 levels would likely sit between 410 and 816 parts per million, driven by increased volcanic activity along the collision zones. Combined with the stronger sun, global average temperatures over land could reach 24.5 to 35.1°C (76 to 95°F). For context, today’s global average land temperature is around 10°C (50°F).
The researchers concluded that the combination of higher solar output and elevated CO2 would likely push Earth past a climate tipping point for mammals, potentially triggering a mass extinction. Much of the supercontinent’s interior would be uninhabitable desert, with lethal heat stress across huge areas. This pattern fits the broader geological record: supercontinent assembly has historically coincided with dramatic shifts in biodiversity, as habitats merge, coastlines shrink, and climate extremes intensify.
How Confident Are Geologists?
The existence of a future supercontinent is about as certain as anything in geology can be. Plate tectonics has been operating for at least 3 billion years, and nothing in Earth’s current thermal or mechanical state suggests it will stop. The continents are moving right now at rates measurable by GPS, roughly the speed your fingernails grow. The specific configuration is where uncertainty lives. Predicting exactly how dozens of plates will interact over hundreds of millions of years involves variables that compound enormously over time. Each of the four models is internally consistent with known physics, but they start from different assumptions about which subduction zones will dominate.
What geologists agree on is the big picture: Earth’s continents will converge again, the process will take 200 to 300 million years, and the result will be a single landmass surrounded by a global ocean. It has happened at least three or four times before Pangea. The cycle is as fundamental to Earth as the water cycle or the carbon cycle, just operating on a timescale that dwarfs human experience.