Abrupt shifts in the evolution of animals – short periods of time when an organism rapidly changes size or form – have long been a challenge for theorists including Darwin. Now a newly published ...

Charles Darwin's theory of gradual evolution is not supported by geological history, New York University Geologist Michael Rampino concludes in an essay in the journal Historical Biology. In fact, ...

Scientists have developed a theoretical model that uncovers the dual role of polyploidy -- organisms carrying extra genome copies -- in evolution. Their findings reveal that polyploidy can stabilize ...