A recent study of stickleback 'ecomorphs' generated by independent speciation events in different freshwater lakes suggests that, despite historical contingency, natural selection can run in surprisingly similar ways on multiple occasions.
Harvey, P. H. (2000, April 1). Evolution: To seek out new worlds. Current Biology. Current Biology Ltd. https://doi.org/10.1016/S0960-9822(00)00404-8