Evolution Revolution: Two Species Become One, Study Says

James Owen for National Geographic News
July 27, 2005

A newfound insect shows that two species can combine to create a third species, and that humans may be unknowingly encouraging evolution, according to researchers.

Most new animal species are believed to arise when a single species splits into two. But new animals can also be created when two species come together to create a single new species, the researchers say.

This two-become-one evolutionary process, common among plants...


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