War is an Alien Threat

More than a century ago a young Frenchman, Alexis de Tocqueville, visited America. After that visit he predicted that the two great powers of the future world would be, on one hand, the United States, which would be built, as he said, ``by the plowshare,'' and, on the other, Russia, which would go forward, again, as he said, ``by the sword.'' Yet need it be so? Cannot swords be turned to plowshares? Can we and all nations not live in peace? In our obsession with antagonisms of the moment, we ...

 Science is About Finding Likeness

All science, is the searchjnr njQJty in hidden likenesses. The search may be on a grand scale, as in the modern theories which try to link the fields of gravitation and electromagnetism. But we do not need to be browbeaten by the scale of science. There are discoveries to be made by snatching a small likeness from the air too, if it is bold enough. In ^935 the Japanese physicist Hideki Yukawa wrote a paper which can still give heart to a young scientist. He took as his starting point the know...