It is gravity that makes sure the world does not come apart in all
directions, the planets follow their orbits, your milk flows into
its glass, the sofa stays on the carpet and space stations do not
vanish into black holes. Although it only acts in one direction,
it is an extremely efficient force.
           That much we have established. We live with it. We have
developed some handy formulae to explain its action.
The phenomenon of magnetism is even harder to understand.
As we all know, it has two equally strong forces. It is true
that we can construct logical models to illustrate the processes,
but here, too, the theory is based on empirical evidence.
One of our great strengths lies in our ability to unite these
diametrically opposed areas of knowledge and apply them to the
development of high-tech products – components, modules
and systems that can be relied on to support our technology-based
           With a precision that would have delighted Messrs Newton
and Maxwell.

Gravitation has one attraction.
We have two and more.