What does an iceless Lake Superior portend?

From Duluth, Lake Superior is a colossal expanse of blue this week with no otherworldly ice shards smashed against the shore or colorful fish houses decorating stretches of white.

Glaciers rise, fall and melt with tides

Glaciers that extend off the edges of landmasses move much more than scientists anticipated, R. Gadi and colleagues have found. The boundary between the grounded part of a glacier and the point at which the glacier extends ...

Iron snow ebb and flow may cause magnetic fields to come and go

Just as snow crystals form in the upper atmosphere, then fall to lower, warmer elevations and melt, scientists believe a phenomenon called iron snow happens in the molten iron cores of some planetary bodies. Cooling near ...

page 3 from 40