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News Release 05-173
Scientists Poke Holes in 'Snowball Earth' Hypothesis
Remains of photosynthesizing microbes in prehistoric rocks suggest Earth was not ice-bound.
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![Was Earth once a snowball or a slushball? Scientists hope to find out.](/news/mmg/media/images/marble_hi2_f.jpg)
Was Earth once a snowball or a slushball? Scientists hope to find out.
Credit: NASA
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