The theoretical physicist who united two of the known forces of the universe was 88 | Obituary
, which did not. The W particles were at play in the observable universe; they were responsible for some sorts of radioactive decay. The Z was notional until, in 1973, researchers at, Europe’s great particle-physics lab, observed “neutral currents” between the particles they were knocking together. These had never been seen before, and could be explained only by the Z. In 1979 the Nobel prize duly followed.
That triumph of unification increased his curiosity about the only point where such high energies were known to have existed: the Big Bang. In his book “The First Three Minutes”, in 1977, he described the immediate aftermath, to the point where the hyper-hot cosmic soup had cooled enough for atomic nuclei to form.
Such a unified law would have given him satisfaction but, he knew, no comfort. Nature’s laws were impersonal, cold and devoid of purpose. Certainly there was no God-directed plan. As he wrote at the end of “The First Three Minutes”, the more the universe seemed comprehensible, the more it seemed pointless. No saying of his became more famous, but the next paragraph softened it: humans gave the universe their own point and purpose by the way they lived, by loving each other and by creating art.
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