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Researchers agree it’s a long shot, but transmissible cancers could theoretically evolve into independent species. Certain weird parasites might be living proof.
Theories about how animals became multicellular are shifting as researchers find greater complexity in our single-celled ancestors.
A single genetic change and some clever geometry show how single-celled organisms can band together to form cooperative multicellular entities.
Bacteria may have helped single-celled organisms make the leap to multicellular animals.
An interview with the developmental biologist Cassandra Extavour on the origins of multicellular organisms and the evolution of cooperation.