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Snowball Earth

Depiction of Earth when it was completely frozen.

Neethis

 

   Teaching and resource materials on "Snowball Earth"

 Vetted background articles on "Snowball Earth"

 

  • Proterozoic Featured Article Proterozoic Proterozoic

    The Proterozoic eon is a time in the Earth's history that occurred from 2.5 billion to 543 million years ago. Many important events in the geologic history of the... More »

  • Ice Age Featured Article Ice Age Ice Age

    Introduction Ice age refers to any of five long term events in the Earth's history. During an ice age, continental glaciers (also called ice sheets) cover... More »

Recently Updated
Earth's Past Climate Reveals Future Global Warming Last Updated on 2015-02-06 10:41:43 Emissions of carbon dioxide are changing the climate and natural factors like clouds may not help  CLICK HERE TO READ MORE More »
Researchers' data show climate change is accelerating the melting of Siberia Last Updated on 2015-02-04 11:47:50 Siberia, one of the world's largest storehouses of frozen greenhouse gases, is melting at a quickened pace. Over the last 7,000 years, winter temperatures in the Siberian permafrost regions have gradually risen, according to new research from German and Russian scientists at the Alfred Wegener Institute (AWI) and published in the journal Nature Geoscience. It's a trend that has long been predicted by climate models but never before been proved.   CLICK HERE TO READ MORE  More »
A 50th anniversary few remember: LBJ's warning on carbon dioxide Last Updated on 2015-02-02 11:03:21 Fifty years ago this this month President Johnson's science advisors delivered the first warning about rising greenhouse gas emissions to a sitting president. On Feb. 8, he warned Congress about altering the atmosphere with carbon emissions. Above, climate scientist Roger Revelle shakes hands with Johnson in the Oval Office. Photo courtesy Roger Revelle Papers, Special Collections & Archives, University of California, San Diego. CLICK HERE TO READ MORE  More »
Scientists track natural responses to climate change Last Updated on 2015-01-02 10:53:41   CLICK HERE TO READ MORE More »
Snow Is Down and Heat Is Up in the Arctic, Report Says Last Updated on 2014-12-19 10:56:57 SAN FRANCISCO — The Arctic continues to warm faster than the rest of the globe, and with greater repercussions, scientists are reporting. CLICK HERE TO READ MORE More »