A rhinoceros living in the High Arctic sounds like a reality you misread on a screen in the middle of the night. But paleontologists working on fossils from Devon Island in Nunavut have described a new species that once walked near the surface of the earth, forcing scientists to rethink how animals moved between continents.
The main takeaway is not just that “there were rhinos in the north.” That is, the North Atlantic may have been more viable for land mammals for longer than many experts believed, and the Arctic is acting less like a wall and more like a corridor when conditions are equal.
A rhinoceros is found where you would least expect it
This animal comes from fossil lakes in the Haughton Crater on Devon Island, and dates back to the Early Miocene 23 million years ago. In the lesson of October 28, 2025 at Nature Ecology & Evolutionresearchers describe this specimen as the most northern rhino species known.
They named it Epiaceratherium suggestsand the brand name “itjilik” means “ice” or “ice” in Inuktitut. The rhinoceros was relatively small and small, about the same size as the modern Indian rhinoceros but without a horn, and the moderate growling of its teeth suggests that it was early to mid-sized.
The fossil record is also unusually complete. Co-author Marisa Gilbert said about 75% of the skeleton was recovered, with the bones preserved in three parts and replaced by minerals, an unusual level of integrity for the remains of mammals.
Much of the material was collected in 1986 by Arctic paleontologist Mary R. Dawson, showing how old fieldwork can still change the story when new analyzes arrive.
The North Atlantic Land Bridge gets a second look
For decades, scientists have debated the North Atlantic Land Bridge, often abbreviated to NALB, which once connected Europe and North America by landmasses, including a passageway across what is now Greenland.
The study shows that the bridge is thought to have been particularly important during periods of warmth such as the Paleocene-Eocene Thermal Maximum, when the environment changed rapidly.
However, the general opinion is that vertebrates did not diverge in this way until later than the early Eocene. The new Arctic rhino, sitting later in time, prompted the team to reconstruct the parts of the rhinoceros family and question whether the traditional timeline is too rigid.
To do so, the researchers compiled records of 57 rhinocerotid taxa, nearly all of which are extinct, assigned them to five broad continental regions, and used a dispersal model to estimate movement between continents.
Their analysis found many European-to-North American dispersals in both directions, and the total nearly approximated the number of dispersals within Eurasia. It’s a reminder that ancient geography can make the Atlantic feel much smaller than it does on a modern map.
Ice, shallow water, and a seasonal route across the north
The strongest point of study is how long the road has been in use. The authors report several dispersal events in the Oligocene-Miocene window and suggest that the North Atlantic route may have crossed mammals at least 20 million years earlier than previously thought, possibly into the Miocene itself.
How could that happen if water was already dividing the land?
The paper argues that parts of the land bridge may have been interrupted by narrow, shallow channels until the Miocene, and that seasonal glaciation in the mid-Eocene would have helped animals cross those gaps. Ice is often thought of as a barrier, but at the right time it can also be a temporary bridge.
The setting of Devon Island helps make the concept easy to understand. The Canadian Museum of Nature notes that fossil plants from this area indicate a temperate forest environment, in stark contrast to today’s cold, dry permafrost, and Haughton Crater itself is about 23 kilometers (about 14 miles) across.
Basically, that means that the Arctic environment was not stable, and it is possible that migration windows opened and closed due to climate.
Why the Miocene rhinoceros is important for ecology and ecology today
On the surface, this is a story about a single extinct animal. Below, it’s about how quickly ecological boundaries can shift as climate and ice change, and whether the Arctic could become a place of evolution rather than extinction.
Lead author Danielle Fraser put the discovery into perspective by pointing to the lost diversity of the family. “Today there are only five species of rhinoceros in Africa and Asia, but in the past they were found in Europe and North America, with more than 50 species known from the fossil record,” he said in a statement from the Canadian Museum of Nature.
Adding the High Arctic brand isn’t just a new name; is a new data point that can redefine migration paths.
There is also a story of the processes running quietly in the background. The same Devon Island rhinoceros has been linked to separate work showing that intact proteins can be recovered from tooth enamel over time, providing another way to examine evolutionary relationships when DNA is depleted.
The lesson was published in Nature Ecology & Evolution.
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