Part 3, Chapter 19 Summary

Global changes are likely to change the finches of the Galapagos, global warming being the main culprit. However, all the toxins that are being, and have been, released into the atmosphere have also rapidly increased the evolutionary path of the world and its species.

During the industrial age, with smoke stacks filling the areas around them with black soot, animals in the vicinity changed, too. With the advent of environmental laws, the evolution reversed itself. It is seen all over the world.

In the Galapagos, where El Niso is effected by global warming, the finches could fuse together into a single species. Unless the reversal changes are dramatic, they may fuse beyond the chance for rapid reversal, and their divergence could take thousands of years. The Grants had never thought about the changes in the climate affecting their finches, but in...