Cryoconite, the layer of dark sediment on top of most glaciers, is a sponge for nuclear contaminants. New research finds that glaciers all over the world — not only those near nuclear disaster sites — are excessively contaminated with radioactive fallout. Credit: Robert Szymanski/Shutterstock The world’s ice is rapidly disappearing, […]

Credit: CC0 Public Domain From a boardwalk overlooking Chicago’s deserted Ohio Street Beach in the throes of winter, it’s not hard to imagine the last ice age. A blanket of fresh snow covers the shoreline and pale blue ice glazes over Lake Michigan as far as the eye can see. […]