Gondwana never quite earned its place among Earth’s official supercontinents.
For years, much of the scientific community questioned whether it deserved the title at all — even though it existed between 800 and 500 million years ago.
A study published Sept. 9, 2026, in the journal Science Advances, based on the analysis of more than 25,000 rocks, uncovered fragments buried beneath the mountains of Asia that may finally settle the debate: Gondwana once covered nearly 80% of Earth’s dry land.
What Is a Supercontinent, and Why Gondwana Didn’t Make the Cut
The concept of supercontinents emerged in the mid-1980s, when a group of geologists identified cyclical, global patterns in sea-level changes visible in the geological record going back at least 2 billion years.
Since then, the scientific community has formally recognized four major supercontinents in Earth’s history.
The oldest confirmed is Columbia, also known as Nuna, which formed between 2 billion and 1.6 billion years ago. Next came Rodinia, roughly 1 billion years ago. Pangea, the most familiar and the most recent, took shape between 300 and 250 million years ago.
Gondwana, which falls chronologically between Rodinia and Pangea, was long treated as the odd one out — never quite convincing enough specialists to earn the same standing as the others.
A Chemical Fingerprint for Tracking a Lost Continent
The team behind the new study turned to a technique that is far from intuitive, yet remarkably precise: the analysis of samarium and neodymium isotopes.
Samarium decays into neodymium at a constant rate, making it a geological clock capable of revealing when a rock originally formed — even if that rock ended up locked inside a far younger mountain range.
Bill Collins, a geologist at Curtin University and co-author of the study, described these isotopic maps as “time machines.”
As he explained, they let scientists identify a continent that formed 500 million years ago, even when the mountains its rocks now sit inside are barely 20 million years old.
A Near-Accidental Discovery in Central Asia
Geologist Tao Wang, the study’s lead author, spent much of his career studying the Central Asian Orogenic Belt, a vast corridor that stretches across the continent from the Ural Mountains to the Pacific Ocean, shaped by successive collisions between continental plates.
For years, his team had been assembling a database of thousands of igneous rocks from the region.
The discovery that a large portion of those rocks shared a common origin with Gondwana came about almost by accident, Wang later recalled — while the team was compiling the data with something else in mind.
Gondwana Covered 80% of the Planet’s Landmass
The new map revealed fragments of continental crust buried beneath parts of Asia, central Europe, and the southeastern corner of North America, all sharing an isotopic signature that points to the same Gondwanan origin.
Until now, the prevailing estimate was that Gondwana had covered roughly two-thirds of the planet’s dry land.
With these newly identified fragments added to the calculation, that figure climbs to nearly 80%, making Gondwana a far larger supercontinent than anyone had imagined.
Not Everyone Is Fully Convinced
Some researchers greeted the findings with skepticism.
David Evans, a paleogeographer at Yale University, noted that identifying ancient crust with a shared geological history is not the same as demonstrating that those fragments were physically joined together 550 million years ago.
Joseph Meert, another specialist weighing in on the findings, raised a different objection: if Gondwana is accepted as larger than previously thought, then the estimated size of Pangea — the supercontinent that formed when Gondwana merged with other landmasses — would also need to be revised upward.
The study’s authors push back, noting that their reconstruction does not rest on isotopic ages alone. They were also able to place the Asian fragments within a connected, continuous structure along the already-established margin of Gondwana.
The Possible Connection to the Cambrian Explosion
Beyond the debate over its precise boundaries, the discovery also offers a clue to one of evolutionary biology’s most enduring mysteries.
That mystery is the Cambrian explosion, the period roughly 538 million years ago when complex life diversified at a remarkable pace, following billions of years dominated almost entirely by simple, single-celled life.
According to the study’s authors, the geological processes that assembled Gondwana also gave rise to an extensive volcanic belt, comparable to today’s Pacific Ring of Fire, which would have released large amounts of gas into the atmosphere, helping to warm a planet that had until then been stuck in an unusually cold phase.
The researchers themselves acknowledge that the map may still be incomplete.
Other fragments of Gondwana may lie submerged beneath the oceans today, or may have been recycled back into Earth’s interior by the very mechanics of plate tectonics — leaving open the possibility that this reconstruction, striking as it is, still isn’t the whole story.
