Pluto is proving to be far more dynamic than a distant frozen sphere. New analysis of NASA's New Horizons data has identified six massive landslides inside three impact craters, showing that the dwarf planet's icy surface can still shift in dramatic ways.
What the researchers found
Using high-resolution images and elevation maps from the 2015 flyby, scientists examined steep crater walls and debris patterns across Pluto's terrain. They found landslides in Coughlin crater, Giclas crater, and one unnamed crater. In each case, material dropped roughly 1.5 to 2.2 kilometers and traveled as far as 14.5 kilometers across the crater floor.
The largest slide covered about 130 square kilometers, a scale large enough to reshape a small urban area. The team says these features are among the clearest signs yet that Pluto's surface has been actively evolving.
Why Pluto can move like this
On Pluto, water ice behaves more like rock because of the extreme cold. Even so, the study suggests that the planet's low gravity and slippery mix of ice and debris may allow material to travel unusually far once a slope fails. Volatile ices such as nitrogen, carbon monoxide, and methane may also influence how surface layers behave over time.
The exact trigger remains uncertain. Possible causes include impact shaking, tectonic stress, erosion, cryovolcanic activity, or temperature-driven changes in surface ice. In one crater, a younger nearby impact may have helped destabilize the slope.
Published in Icarus, the study adds a new layer to Pluto's geological story and hints that more hidden slope failures may be waiting to be mapped. As future missions and better models build on this work, Pluto could become an important reference point for understanding how icy worlds evolve across the solar system.
