Experimental evolution is the use of laboratory experiments or controlled field manipulations to explore evolutionary dynamics. Evolution may be observed in the laboratory as populations adapt to new
This Chihuahua mix and Great Dane show the wide range of dog breed sizes created using artificial selection.
Mouse from the Garland selection experiment with attached running wheel and its rotation counter
Female mouse with her litter, from the Garland selection experiment
Darwin's finches by Gould
The E. coli long-term evolution experiment is an ongoing study in experimental evolution begun by Richard Lenski at the University of California, Irvine, carried on by Lenski and colleagues at Michiga
The 12 E. coli LTEE populations on June 25, 2008.
The population designated Ara-3 (center) is more turbid because that population evolved to use the citrate present in the growth medium.