A new study from CU Boulder finds that hundreds of millions of years ago, small single-celled organisms may have evolved into larger multicellular life forms to better propel themselves through icy waters. Two fossils of Brooksella alternata [Credit: Glenn Asakawa/CU Boulder] The research was led by paleobiologist Carl Simpson and appears today in the journal The American Naturalist. It hones in on a question that's central to the history of the planet: How did life on Earth,...


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