Scientists have discovered plume-like structures deep inside Greenland's ice sheet, which they now believe are caused by thermal convection—a process usually associated with Earth's mantle. Using computer modeling, researchers simulated a 2.5 km thick ice slice and found that under certain conditions, plume-like upwellings form, resembling the radar images previously observed. These structures suggest that parts of the ice sheet may be significantly softer than previously thought, due to heat transfer from Earth's interior, generated by radioactive decay and residual heat. Although this discovery challenges traditional views of ice as a solid, it does not necessarily imply faster melting or increased sea-level rise. The findings, published in *The Cryosphere*, highlight the complex dynamics within Greenland’s ice and their importance for future climate modeling.