Scientists 'see new species born'
Scientists at the University of Arizona may have witnessed the birth of a new species for the first time. Biologists Laura Reed and Prof Therese Markow made the discovery by observing breeding patterns of fruit flies that live on rotting cacti in deserts… Whether the two closely related fruit fly populations the scientists studied - Drosophila mojavensis and Drosophila arizonae - represent one species or two is still debated by biologists. However, the University of Arizona researchers believe the insects are in the early stages of diverging into separate species.