Re-evolution

Dramatic reverse evolution found among fish species

Washington: Scientists have discovered a process of “reverse evolution” among tiny fish species living in Lake Washington, a finding that is being linked to a pollutioncontrol effort in the United States.
The study showed that evolutionary process was taking place in relative warpspeed reverse in the case of the threespine stickleback fish, which live in Lake Washington. Thanks to a $140 million cleanup effort in the mid-1960s today the lake’s transparency has reached a depth of 10 feet.
Lacking the cover of darkness they once enjoyed, about half of the lake sticklebacks have evolved to become fully armoured, with bony plates protecting their bodies from head to tail. Experts at Fred Hutchinson Cancer Research Centre found that while in the late 1960s, only 6% of sticklebacks were completely plated, today 49% are fully plated and 35% are partially plated.