You may not feel outstandingly robust, but if you are an average-sized adult you will contain within your modest frame no less than 7 X 10^18 joules of potential energy—enough to explode with the force of thirty very large hydrogen bombs, assuming you knew how to liberate it and really wished to make a point.

Think of a single problem confronting the world today. Disease, poverty, global warming... If the problem is going to be solved, it is science that is going to solve it. Scientists tend to be unappreciated in the world at large, but you can hardly overstate the importance of the work they do. If anyone ever cures cancer, it will be a guy with a science degree. Or a woman with a science degree.

Open your refrigerator door, and you summon forth more light than the total amount enjoyed by most households in the 18th century. The world at night, for much of history, was a very dark place, indeed.

In three minutes, 98 percent of all the matter there is or will ever be has been produced. We have a universe

I don't want to go and start trying to make jokes in places like India, Tanzania or Iraq. Afghanistan is not a funny place.

So here I am, my affections torn between a postal service that never feeds me but can tackle a challenge and one that gives me free tape and prompt service but won't help me out when I can't remember a street name. The lesson to draw from this, of course, is that when you move from one country to another you have to accept that there are some things that are better and some things worse, and there is nothing you can do about it. That may not be the profoundest of insights to take away from a morning's outing, but I did get a free doughnut as well, so on balance I guess I'm happy.

Because time moves more slowly in Kid World ... it goes on for decades ... It is adult life that is over in a twinkling.