High up in the mountains you can find the ice glaciers, and although they are very cold, microorganisms can live even there. The bacteria prefer to live around dirt particles, because they like to eat dirt.
Where the white snow and the glacier ice throw back the warming sunlight and where there is dirt, the sunlight stays.
As a result, it gets warmer and the dirt melts a hole in the ice and the melted water forms a small lake. In this tiny lake (cryoconite) live bacteria, fungi, other microorganisms and tardigrades. You can see them under the microscope.