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.

My libertarian beliefs have not always served me well. Like most people who hold strong ideological convictions, I find that, too often, my beliefs trump the scientific facts.