What makes the Great Salt Lake in northern Utah salty? What makes freshwater lakes...well, fresh?
Is Chicago really sinking? Find out on this Moment of Science.
Over a hundred quakes have happened in the last decade. But they didn't occur near fault lines. What were they near? Find out on this Moment of Science.
This means that the ice cover contains microorganisms that date back thousands of years; recently scientists found microorganisms that froze way back when Rome was founded.
During the current ice age glaciers have advanced and retreated over twenty times. We’re living during one of the warmer periods when the glaciers have retreated.