1933

Nobel Prize in Physics

An Equation That Demanded a Twin

Erwin Schrödinger · Paul Dirac

By the late 1920s it was clear that Newtonian mechanics simply broke down at the scale of the electron — particles refused to behave like tiny billiard balls and the old physics had no vocabulary for what they were doing instead. Schrödinger, drawing on de Broglie's notion of matter waves and working in an Alpine villa in a burst of concentrated inspiration over Christmas 1925, produced a wave equation that described exactly how the quantum state of a particle evolves — not where it is, but the probability of finding it anywhere. Dirac, working with a different temperament entirely — laconic, mathematical, almost contemptuous of fuss — extended the formalism to be compatible with special relativity, producing an equation so elegant it horrified him slightly when it demanded the existence of a positively charged electron, a particle that had never been observed. Carl Anderson confirmed the positron experimentally in 1932, which must have been satisfying for Dirac and almost certainly struck him as merely correct. Together, they built the two load-bearing pillars of quantum mechanics: without the Schrödinger equation, there is no modern chemistry, no understanding of atomic spectra, no basis for the semiconductor; without Dirac's relativistic extension, the predictions of particle physics simply collapse.

Nobel Prize in Physiology or Medicine

A Map of Life You Could Draw

Thomas H. Morgan

Gregor Mendel had left behind ratios — three-to-one, two-to-one — but no mechanism; heredity was a pattern with nothing behind it but faith in some abstract factor he called 'elements.' Thomas Hunt Morgan arrived at Columbia around 1908 deeply skeptical of the chromosome theory of inheritance, and set about disproving it using Drosophila melanogaster, the common fruit fly, which breeds fast, produces many offspring, and has conveniently few chromosomes. What he found instead was that certain traits were inherited together far more often than chance allowed, that the linkage varied in a systematic way, and that chromosomes physically exchange segments during reproduction — a process called crossing over — allowing traits to be mapped in relative position along the chromosome like stations on a line. The 'fly room' at Columbia, cramped and pungent, produced a genetic map of an organism for the first time in history. Morgan had demonstrated that genes are not ethereal tendencies but physical things, located at specific addresses on specific chromosomes, and that the map of life was a map you could actually draw. Every genetic test, every chromosome-based diagnosis, every genomic sequencing effort done since traces its conceptual debt directly to those fruit flies.

Nobel Prize in Literature

Elegy Written Like Ordinary Fact

Ivan Bunin

Ivan Bunin had left Russia in 1920 and never went back, which meant he spent the rest of his life writing, from a Paris apartment, about a country that had been destroyed — not by war but by revolution, which is a more thorough kind of destruction because it dismantles the past on purpose. He became the first Russian émigré to win the Nobel Prize in Literature, and in accepting it he was accepting a particular role: keeper of the textures of a world that Soviet Russia was actively trying to make unrememberable. His prose works with precision rather than sentiment — the dry heat of a provincial afternoon, the smell of apples in a cool storeroom, the exact quality of boredom of the gentry — and precisely because he refuses to mourn openly, the loss accumulates behind the sentences like pressure behind a wall. He did not write nostalgia; he wrote elegy with the tone of a man recounting ordinary fact. The Swedish Academy rewarded a literature of displacement and witness, and the prize still reads as recognition that the act of remembering, done with sufficient exactness, is itself a form of resistance.

Nobel Peace Prize

Correct, and Four Years Too Late

Sir Norman Angell

Norman Angell published 'The Great Illusion' in 1910, arguing with considerable patience and mathematical clarity that modern industrial economies were so deeply interlocked through trade, credit, and capital flows that a major European war would be financially ruinous for the victor as much as the vanquished — the conquest of territory simply could not produce the wealth that contemporary commentators imagined. He was not arguing that war was immoral; he was arguing that it was irrational, which he hoped would be more persuasive. It was not. The first world war arrived four years later, demonstrated his thesis rather elegantly, and then a second one arrived anyway, as though by way of confirmation. Angell received the peace prize in 1933 while Adolf Hitler was consolidating power in Berlin and the mechanisms of the next catastrophe were being assembled with great energy. This is not, in fairness, an indictment of Angell, whose logic was sound; it is more a melancholy observation about the relationship between sound arguments and the world's willingness to act on them. His real legacy is the economic architecture — the very concept that interdependence deters conflict — that did eventually, after sufficient carnage, become the foundation of post-war international institutions.

Adrian and Hodgkin pioneer electrophysiology

Catching a Thought Mid-Spike

Edgar Adrian · Alan Hodgkin

The idea that nerves carry electrical signals was not new — Du Bois-Reymond had detected what he called 'action currents' in the 1840s using a galvanometer — but measuring a signal in a single nerve fibre, rather than the smeared average of many, required instruments that only became available in the 1920s. Edgar Adrian, who had already won the Nobel Prize in 1932 for showing that nerve impulses are discrete, all-or-nothing spikes rather than graded signals, was working alongside the young Alan Hodgkin, who was beginning to probe the membrane mechanisms that generate the spike itself. The action potential — a voltage that reverses briefly and propagates along a neuron with the self-sustaining urgency of a falling line of dominoes — was now something that could be isolated, displayed, timed, and manipulated. This was not just a technical achievement. To record a single neuron firing is to intercept thought at its smallest indivisible unit, to catch the physical substrate of sensation in the act. The work Hodgkin and his collaborator Huxley completed in the 1950s, explaining precisely how sodium and potassium ions surge through the membrane to produce the spike, became the quantitative foundation of all modern neuroscience — and of every drug that acts by modifying what nerves do.

DNA structural chemistry clarified

The Backbone Right, the Pattern Wrong

Phoebus Levene

Phoebus Levene had spent decades at the Rockefeller Institute methodically disassembling the nucleic acids — breaking them into their components, identifying the sugars, the phosphate groups, the nitrogen bases — and by the early 1930s had established that DNA was built from deoxyribose units linked by phosphate bridges into a repeating chain. This sounds like bookkeeping, and in a sense it was, but bookkeeping of a particular kind: what Levene described was a backbone, a structural spine along which other things could be arranged in varying order. The catch — and it was a substantial one — was that Levene also concluded, on the basis of the limited data available, that the four bases occurred in roughly equal proportions and probably repeated in a fixed tetranucleotide pattern, which suggested a molecule too monotonous to carry information. This conclusion delayed the recognition of DNA as the molecule of heredity by roughly twenty years; it took Erwin Chargaff's careful measurements in the late 1940s to show that the base ratios varied between species, and therefore varied by instruction. Levene got the backbone right, which was enough to let Watson and Crick build their model; he got the pattern wrong, which is a reminder that accumulating the right facts in the wrong order can be almost as obstructive as having no facts at all.

Nazi boycott of Jewish scientists begins

Germany Mails Away Its Physicists

On 7 April 1933, the Law for the Restoration of the Professional Civil Service came into force, removing Jews and political opponents from public employment — which in a country where universities and research institutes were state institutions meant removing them from science. The names on the departure list read like a roll call of twentieth-century physics and mathematics: Einstein, of course, already in the United States when the law passed and wise enough not to return; but also James Franck, Max Born, Leo Szilard, John von Neumann, Edward Teller, Lise Meitner, and dozens more, all of whom took their training, their methods, their contacts, and their problems with them to Britain, the United States, and wherever else would have them. Germany had, within a few years, dismantled what was arguably the most productive concentration of theoretical talent in the world, distributing it across Allied universities with a generosity it neither intended nor noticed. The Manhattan Project, which eventually produced the weapons that ended the war Germany started, drew heavily on the expertise of physicists the Reich had expelled. It is, by some distance, the most consequential act of self-sabotage in the history of science.