Coal Almost Turned Earth into a Giant Ball of Ice | Discover Magazine
Science column: Let's talk seriously about global freezing | PostIndependent.com
Study: A plunge in incoming sunlight may have triggered “Snowball Earths” | MIT News | Massachusetts Institute of Technology
Snowball Earth or Slushball Earths? 3 times Earth was covered in ice | GEO GIRL - YouTube
NASA GISS: Research Features: "Snowball Earth" Might Have Been Slushy
Earth-Mass "Ice Ball" Planet Found 13,000 Light-Years Away - Scientific American
The Ice Age Has Nothing on 'Snowball Earth' - The Atlantic
DOE Explains...Earth System and Climate Models | Department of Energy
Not Snowball Earth, More of a Slushball Earth - Universe Today
How Volcanoes Froze the Earth (Twice) - YouTube
The story of Snowball Earth
All of Earth's water in a single sphere! | U.S. Geological Survey
When Earth was a Snowball | CNRS News
Hydrosphere
Glacial and interglacial periods - Energy Education
The story of Snowball Earth
The Ice Age Has Nothing on 'Snowball Earth' - The Atlantic
NASA GISS: Research Features: "Snowball Earth" Might Have Been Slushy
Cryospheric Sciences | Image of the Week – The solid Earth: softer than you might think!
The flat-Earth conspiracy is spreading around the globe. Does it hide a darker core? | CNN
A Perfect Storm of Fire and Ice May Have Led to Snowball Earth | Harvard University Center for the Environment
Weak tides may have contributed to 'Snowball Earth' | Bangor University
