Science Daily Reports that
"'Striking differences in head size and shape, increased bite strength and the development of new structures in the lizard’s digestive tracts were noted after only 36 years, which is an extremely short time scale,' says Duncan Irschick, a professor of biology at the University of Massachusetts Amherst. 'These physical changes have occurred side-by-side with dramatic changes in population density and social structure.'"
Over the course of 36 years (roughly 30 generations) these lizards have evolved novel "cecal valves" which "slow the passage of food by creating fermentation chambers in the gut, where microbes can break down the difficult to digest portion of plants."
Cecal valves were never before reported for this species, and in fact are known in less than one percent of scaled reptiles.
This once again demolishes the creationist argument that evolution cannot "produce new information". We know it can, we have witnessed novel structures evolve.