But there, in contrast to physics, things come to an end. In place of depth, the biologist requires intellectual extent. This is an oversimplification only in the sense that it is the details that need to be filled in. The outline is clear enough. It reveals an intellectual landscape far simpler than the one inhabited by mathematicians.
Mathematical science requires theories, molecular biology, facts.
As one century gives way and another comes to replace it, the very nature of science as a distinctive human activity is ineluctably changing.