All scientific progress requires a climate of strong skepticism.

We now have many of the answers that once eluded Darwin, thanks to two developments that he could not have imagined: continental drift and molecular taxonomy.

Evolution tells us where we came from, not where we can go.

In religion, faith is a virtue. In science, faith is a vice.

In the end theologians are jealous of science, for they are aware that it has greater authority than do their own ways of finding "truth": dogma, authority, and revelation. Science does find truth, faith does not.

Because of the hegemony of fundamentalist religion in the United States, this country has been among the most resistant to the fact of human evolution.

A well-understood and testable hypothesis like sexual selection surely trumps an untestable appeal to the inscrutable caprices of a creator.