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.

You cannot understand the glories of the universe without believing there is some Supreme Power behind it.

There is no way that we can predict the weather six months ahead beyond giving the seasonal average.

One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember it is there and don't throw it away.

The universe does not behave according to our pre-conceived ideas. It continues to surprise us.

I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first.

But a machine that was powerful enough to accelerate particles to the grand unification energy would have to be as big as the Solar System - and would be unlikely to be funded in the present economic climate.