"If you can think of continent-size ice sheets sitting where Saudi Arabia is right now, that will give you an idea of how cold the environment seemed to be."
- Linda Sohl of NASA Goddard Institute for Space Studies discussing ancient ‘Snowball Earth’ periods on our planet.
Sohl studies global climate conditions and their connections to the biosphere. Earth is thought to have gone through three ‘snowball Earth’ phases in its past, where the entire planet was covered with ice (Image from MIT).
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