from the it's-not-dark-yet-but-it's-getting-there dept.
sciencehabit (1205606) writes "Greenland's white snow is getting darker. Scientists have generally attributed that darkening to larger, slightly less white snow grains caused by warmer temperatures. But researchers have found a new source of darkening taking hold: impurities in the snow. The new darkening effect could easily add 2 centimeters to the projections of 20 cm sea level rise by 2100—and perhaps more if impurity levels grow with time."
"The fundamental principle of science, the definition almost, is this: the
sole test of the validity of any idea is experiment."
-- Richard P. Feynman