The document discusses Charles Darwin and Stephen Jay Gould's examination of bird specimens from the Galapagos Islands that were originally collected by Darwin. It describes how Gould re-examined the specimens and determined that there were 13 distinct species of finches and mockingbirds, with each species residing on its own island, which supported Darwin's theory that isolation can lead to the formation of new species over time.

1. Darwin vs. Gould The most significant revolution of our time; The theory of evolution.

2. Darwin vs. Gould When Darwin returned from his 5 year travels, a collection, a host of birds from the Galapagos Islands were given to Gould.

3. Darwin vs. Gould Darwin,explained that the collection were of mixed birds of finches and mockingbirds

4. Darwin vs. Gould 6 days later, Gould responded that the birds were not so mixed after all. “…they were thirteen species and related by plumage, beaks etc”.

5. Darwin vs. Gould Darwin was confused. That the number of species matched the total number of islands in the Galapagos Islands, Thirteen in numbers!

6. Darwin vs. Gould Darwin, again surprised by Gould !! Gould reports. The mockingbirds that Darwin thought were all varieties of the same species, were actually, each a distinct species by itself, one for each island.

7. Darwin vs. Gould Darwin’s Postulate !! “ Is it possible for a species of birds to splits into two(or more) species if the birds were isolated on separate islands ? This formed the theory of evolution.