Crazy ideas sometimes work, and the technological society that we have is built on a foundation of those crazy ideas that work.

The first thing that is not obvious to people is global warming is a less-than-1% effect. It's like being shortchanged at the bank by a penny every dollar. Over a long period of time with lots of transactions, that piles up.

For relatively modest amounts of sulfur dioxide injected into the atmosphere, you could easily cool Earth by 1% or more, if you want.

A person's basic humanity is not governed by how he or she came into this world, or whether somebody else happens to have the same DNA.

People get cranky when you burst their bubble. Over time, advances in astronomy have relentlessly reinforced the utter insignificance of Earth on a celestial scale. Fortunately, political and religious leaders stopped barbecuing astronomers for saying so, turning their spits with human-rights activists instead.

Among modern occupations, only cult leaders and TV weathermen rival the technological visionary's ability to retain credibility despite all evidence to the contrary.

If you have a block of ballistics gelatin and a high-speed camera, pretty soon somebody gets a gun!