"Researchers from three British centers have put the natural course of events in reverse to reveal how a rearrangement of genetic matter could help drive evolution.

Working with baker's yeast, investigators from the University of Manchester, the University of Leicester and the Institute of Food Research in Norwich, England, found swapping large chunks of genetic material might spur the split of one species into two."

"...With some repositioning of their genetic material, the two species took on such a similarity they were able to interbreed -- although with less than 100 percent success. The observations suggest chromosomal rearrangement, or translocation, might play an important role in the evolution of new species, geneticists said. "

So.... another piece of evidence. It won't be long before scientists work out that some of that "junk DNA" is really evolutionary options. And when something triggers it (radiation?), our bodies choose to evolve into a new species. Pre-planned evolution, happening all of a sudden, by choice.