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shorter Snowball Earth periodQuanta Magazine
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Carl Simpson , a paleobiologist at the University of Colorado , Boulder , conducted an experiment designed to see what a modern single-celled organism does when confronted with higher viscosity.
It suggests that if Snowball Earth did act as a trigger for the evolution of complex life, it might be due to the physics of cold water.
Under the conditions of Snowball Earth , the ocean would have been twice or even four times as viscous as it was before the planet froze over.
To very small single-celled creatures, thick seawater would have posed some big problems.
A bigger organism, on the other hand, can navigate thicker waters without much trouble.
Viscosity may have mattered quite a lot in the origins of complex life, says Carl Simpson .
The ability to move easily in the ocean during Snowball Earth is something we take for granted.
Simpson 's hypothesis makes a few logical leaps that don’t hold up, says a geobiologist.
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