As those who have seen Jurassic Park will know, this means a tiny disturbance in one place, can cause a major change in another. A butterfly flapping its wings can cause rain in Central Park, New York. The trouble is, it is not repeatable. The next time the butterfly flaps its wings, a host of other things will be different, which will also influence the weather. That is why weather forecasts are so unreliable.

Government works best under the glare of public scrutiny. Absent such scrutiny, abuses occur.

[On President Bush's plan to get to Mars in 10 years] Stupid. Robots would do a better job and be much cheaper because you don't have to bring them back.

I have so much that I want to do. I hate wasting time.

Equations are just the boring part of mathematics. I attempt to see things in terms of geometry.

Many people do not like the idea that time has a beginning, probably because it smacks of divine intervention. (The Catholic Church, on the other hand, seized on the big bang model and in 1951 officially pronounced it to be in accordance with the Bible.

Doing a job RIGHT the first time gets the job done. Doing the job WRONG fourteen times gives you job security.