Last I checked...”After 80 years and millions of generations of fruit flies subjected to X rays and chemicals which cause mutations, all they have been able to produce are more of the same: fruit flies.”
Evolution takes a little more than 80 years.
Then you haven’t checked. I found this in 3 minutes of searching.
“Dobzhansky and Pavlovsky (1971) reported a speciation event that occurred in a laboratory culture of Drosophila paulistorum sometime between 1958 and 1963. The culture was descended from a single inseminated female that was captured in the Llanos of Colombia. In 1958 this strain produced fertile hybrids when crossed with conspecifics of different strains from Orinocan. From 1963 onward crosses with Orinocan strains produced only sterile males. Initially no assortative mating or behavioral isolation was seen between the Llanos strain and the Orinocan strains. Later on Dobzhansky produced assortative mating (Dobzhansky 1972).”