These mysteries about how we evolved should not distract us from the indisputable fact that we did evolve.

If the entire course of evolution were compressed into a single year, the earliest bacteria would appear at the end of March, but we wouldn't see the first human ancestors until 6 a.m. on December 31st. The golden age of Greece, about 500 BCE, would occur just thirty seconds before midnight.

In science's pecking order, evolutionary biology lurks somewhere near the bottom, far closer to phrenology than to physics. For evolutionary biology is a historical science, laden with history's inevitable imponderables. We evolutionary biologists cannot generate a Cretaceous Park to observe exactly what killed the dinosaurs; and, unlike "harder" scientists, we usually cannot resolve issues with a simple experiment, such as adding tube A to tube B and noting the color of the mixture.

[W]hen one has a religious experience, what is 'true' is only that one has had that experience, not that its contents convey anything about reality. To determine that, one needs a way to verify the contents of a revelation, and that means science.