THIS year contains two notable scientific anniversaries. The one most widely mentioned is the centenary of Albert Einstein’s three trailblazing papers in the German scientific journal Annalen der Physik on the nature of matter, energy, and motion. Those papers opened up broad new territories for exploration by physicists. The discoveries that followed, and the technology that flowed from those discoveries, helped shape the whole 20th century. Radiation therapy and nuclear weapons, the laser and the personal computer, global positioning satellites and fiber-optic cables-all trace at least part of their lineage to Einstein’s papers. The 20th century was the Age of Physics. The first quarter of that century-when dramatic discoveries in the field were coming thick and fast, with theory racing to keep up-was a wonderfully exciting time to be a young physicist.
It seems to me that we are passing from the Age of Physics to the Age of Biology. It is not quite the case that nothing is happening in physics, but certainly there is nothing like the excitement of the early 20th century. Physics seems, in fact, to have got itself into a cul-de-sac, obsessing over theories so mathematically abstruse that nobody even knows how to test them.





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