But honestly, if you do a rigorous survey of my work, I'll bet you'll find that biology is a theme far more often than physical science.
David BrinThe measure of (mental) health is flexibility (not comparison to some 'norm'), the freedom to learn from experience ... to be influenced by reasonable arguments ... and the appeal to the emotions ... and especially the freedom to cease when sated. The essence of illness is the freezing of behavior into unalterable and insatiable patterns.
David Brin