The case for exploiting animals for food, clothing and entertainment often relies on our superior intelligence, language and self-awareness: the rights of the superior being trump those of the inferior.

Skeptics question the validity of a particular claim by calling for evidence to prove or disprove it.

A Hubble Space Telescope photograph of the universe evokes far more awe for creation than light streaming through a stained glass window in a cathedral.

Through no divine design or cosmic plan, we have inherited the mantle of life's caretaker on the earth, the only home we have ever known.

I went to college at the University of Kansas, where I got a degree in political science.

Economic science concerns itself primarily with theoretical and empirical generalizations about the behavior of individuals, institutions, markets, and national economies. Most academic research falls in this category.

I think there's a certain lyricism in the telling of a scientific story.

I resist the idea of there being on-screen chemistry. I think it's something that people like to say without thinking.