1995

Nobel Prize in Physics

A Ghost Particle, Finally Caught

Martin L. Perl · Frederick Reines

The 1995 Physics prize reached across four decades to honour two detections so difficult that many physicists had doubted whether they could be made at all. Frederick Reines and the late Clyde Cowan had caught neutrinos in 1956 by positioning large tanks of cadmium chloride solution beside a nuclear reactor at Savannah River and watching for the telltale flash of annihilation that the nearly-massless particles would occasionally produce — a signal rate of a few per hour against the roar of reactor noise. Martin Perl's was a different kind of patience: working at SLAC through the early 1970s, he found an anomalous signal in electron-positron collisions that pointed to a third charged lepton, heavier than the muon but otherwise disturbingly like it, which he named the tau. Nobody had asked for a tau lepton; the Standard Model did not require it; it simply turned up. Together, the prizes acknowledged that the universe has more pieces than theorists find tidy, and that finding even one of them can take most of a career.

Nobel Prize in Chemistry

One Chlorine Atom, Ten Thousand Ozones

Paul J. Crutzen · Mario J. Molina · F. Sherwood Rowland

In 1974, Mario Molina and F. Sherwood Rowland published a paper in Nature arguing that chlorofluorocarbons — the inert, non-toxic, entirely pleasant refrigerants and propellants that industry had spent decades congratulating itself on — were anything but harmless once they drifted into the stratosphere, where ultraviolet light broke them apart and released chlorine radicals that could destroy ozone catalytically, one atom doing the work of ten thousand. Paul Crutzen had already shown that nitrogen oxides acted through the same catalytic mechanism. The chemical industry disputed the findings with considerable energy, and for a time the science was treated as a policy problem rather than a physical fact. Then, in 1985, the British Antarctic Survey measured a hole in the ozone layer above Antarctica so large that the team initially assumed their instruments were broken. The Montreal Protocol followed in 1987, phasing out CFCs — an international agreement that actually held. The committee's citation noted that these three had helped save the biosphere from a particularly well-marketed catastrophe.

Nobel Prize in Physiology or Medicine

The Fly That Grew Legs on Its Head

Edward B. Lewis · Christiane Nüsslein-Volhard · Eric F. Wieschaus

The question of how a single fertilised cell knows to build a head at one end and feet at the other — and to put the right number of segments in between — is not an obvious one to answer with a fruit fly, yet that is exactly what this prize rewarded. Edward Lewis, working at Caltech over several decades, identified the homeotic genes: master-switch sequences whose mutations produce haunting doubles and transpositions, flies with legs where their antennae should be, as if the blueprint were read from the wrong page. Christiane Nüsslein-Volhard and Eric Wieschaus then embarked on a systematic screen of the entire Drosophila genome, feeding flies mutagenic chemicals and patiently examining thousands of embryos under a microscope, until they had catalogued the full set of genes governing the body plan. The findings would have been remarkable enough for flies; what made them extraordinary was that the same genes, in very similar forms, turned out to govern the embryonic development of every vertebrate that had yet been examined — which suggested that the basic architecture of animal bodies was solved once, very long ago, and has been conserved ever since.

Nobel Prize in Literature

A Pump in the Yard, Made to Argue

Seamus Heaney

Seamus Heaney grew up the eldest of nine children on a farm in County Derry, in a landscape of bogs, blackberry hedgerows, and the slow, accumulated weight of Irish history — and he never really left it, even when he was holding a chair at Harvard or Oxford. His poems work through the particular and the local: a pump in a yard, a body preserved in peat for two thousand years, a diviner's forked hazel rod dipping toward water. What distinguishes them is that the particular never stays merely particular; the bog bodies become meditations on violence and belonging, the pump becomes a reckoning with the past. The Swedish Academy cited his 'lyrical beauty and ethical depth,' a formulation that manages to be accurate without being quite adequate: what Heaney achieved was the rarer thing of making those two properties inseparable, so that the beauty of a line carries an argument and the argument earns its beauty. He received the news of the prize, reportedly, with characteristic understatement.

Nobel Peace Prize

He Left Los Alamos on Principle

Joseph Rotblat · Pugwash Conferences on Science and World Affairs

Joseph Rotblat joined the Manhattan Project as a Polish-born physicist who had fled wartime Europe and felt, as many did, that the race to build a bomb before Germany was a matter of survival. When Germany surrendered in 1945 and it became clear the bomb would be used against Japan, he resigned — the only scientist to leave the project on explicitly moral grounds, at considerable professional cost. He spent the following decades building what became the Pugwash Conferences on Science and World Affairs, which brought together physicists, chemists, and strategists from both sides of the Cold War to discuss the weapons they had collectively created, on the theory that the people most qualified to describe the danger of nuclear arms were the ones who understood how they worked. The prize honoured both the conscience that made him leave Los Alamos and the fifty years of careful, difficult conversation that followed: the proposition that scientists bear some responsibility for what is done with their science.

Sveriges Riksbank Prize in Economic Sciences

Policy Cannot Fool People Twice

Robert E. Lucas Jr.

The central insight Robert Lucas brought to macroeconomics in the 1970s was that people are not passive props in the economist's theatre. If a government adopts a predictable policy of expanding the money supply to stimulate employment, workers and firms will eventually anticipate the resulting inflation, adjust their wage demands accordingly, and leave the real economy exactly where it started — the stimulus inflating away before it does any good. This came to be called the Lucas critique, and its methodological consequence was severe: any macroeconomic model that treats behaviour as fixed under policy changes is, Lucas argued, fundamentally unreliable, because behaviour is not fixed. The profession spent the following decades arguing about the limits of this insight — rational expectations are a useful approximation, but people are not perfectly rational calculators — yet even the critics absorbed the basic point, and macroeconomics has not been quite as naïve about policy interventions since.

Ig Nobel Prize in Psychology

Pigeons Learn to Tell Monet from Picasso

Shigeru Watanabe · Junko Sakamoto · Masumi Wakita

Shigeru Watanabe and colleagues at Keio University trained pigeons, through patient operant conditioning, to discriminate reliably between paintings by Picasso and paintings by Monet — and not just the specific works used in training, but new examples the birds had never seen. The pigeons generalized correctly: Cubist fragmentation was Cubist fragmentation whether it appeared in 'Les Demoiselles d'Avignon' or another canvas, and the soft, dissolved light of Impressionism was recognisable across different Monet paintings as well. Whether this constitutes aesthetic appreciation or simply pattern recognition is a question the experimenters were careful not to answer, leaving open the slightly disquieting possibility that what we call taste is largely a matter of very good feature-detection. Art critics have not yet commented as a group.

Ig Nobel Prize in Economics

Account 88888 Was Not Lucky

Nick Leeson · Barings Bank · Robert Citron · Orange County

In a year that provided an unusual abundance of material for the economics category, the Ig Nobel committee settled on two cases of financial innovation that had not gone as planned. Nick Leeson, a derivatives trader at Barings' Singapore office, had been concealing losses in an error account numbered 88888 — considered auspicious in Chinese numerology, which did not in the end help — and by the time the concealment unravelled in February, the losses stood at £827 million, and Barings Bank, founded in 1762, ceased to exist. Separately, Robert Citron, treasurer of Orange County, California, had built a portfolio of interest-rate bets that worked beautifully while rates stayed low and then absolutely did not, leading the county to file for the largest municipal bankruptcy in American history at that point. The committee gave them a joint prize for teaching, by vivid demonstration, that leverage is not a synonym for strategy.

Ig Nobel Prize in Medicine

Your Left Nostril Has Opinions

Marcia Buebel · David S. Shannahoff-Khalsa · Michael R. Boyle

The ancient yogic practice of pranayama has long maintained that breathing through the left nostril activates the right hemisphere of the brain and vice versa — a claim that, unusually for yogic lore, was amenable to experimental testing. Marcia Buebel, David Shannahoff-Khalsa, and Michael Boyle set out to test it, recruiting subjects to breathe exclusively through one nostril or the other and then assessing their performance on cognitive tasks designed to probe hemispheric specialisation. The results indicated differential effects depending on which nostril was in use, lending the ancient claim a measure of empirical support. Humans have been breathing through both nostrils simultaneously for the duration of the species, apparently leaving considerable cognitive potential unrealised. The research was entirely earnest, which is, perhaps, precisely why it won.

Ig Nobel Prize in Physics

The Precise Kinetics of Sogginess

Dominique Georget · Roland Parker · Andrew Smith

Every person who has ever poured milk on cereal and then paused to read the back of the box has conducted an informal experiment in food physics; Dominique Georget, Roland Parker, and Andrew Smith simply ran it properly. Their study measured the precise water content, the time elapsed, and the structural mechanics governing the moment when a puffed cereal grain loses its crunch and collapses into something closer to wet cardboard — mapping the kinetics of sogginess with the rigour ordinarily applied to materials under industrial stress. It is, at heart, a problem in porous-material mechanics and water activity, and it received the quantitative treatment it arguably always deserved. The study has been cited in the breakfast-food industry, which suggests that not all knowledge is useless simply because it is absurd.

Ig Nobel Prize in Public Health

Damp Socks, Measured Properly

Martha Bakkevig · Ruth Nielsen

Martha Bakkevig and Ruth Nielsen addressed a problem that anyone who has ever stepped in a puddle wearing thin socks will recognise without needing it explained, but which had not previously been subjected to controlled measurement: how does wet underwear affect the body's ability to maintain core temperature in cold conditions? The answer, established with thermocouples and carefully moistened garments and presumably willing volunteers, was that it measurably impairs thermoregulation — damp fabric conducting heat away from the body significantly faster than dry fabric of the same weight. The finding has straightforward implications for cold-weather gear, occupational safety in outdoor work, and possibly the judgement of hikers who dismiss moisture-wicking fabrics as marketing. It is the kind of science that is obvious in retrospect, except that nobody had the numbers before.

Ig Nobel Prize in Chemistry

A Perfume Named for a Molecule It Lacked

Bijan Pakzad

Bijan Pakzad, a Beverly Hills designer of expensive fragrances, was awarded the Chemistry prize for creating DNA Cologne and DNA Perfume — scents that contained, the committee was at pains to note, no deoxyribonucleic acid whatsoever, and which came packaged in a bottle shaped like a triple helix, a structure that DNA also does not possess. The genius of the product was purely nominal: 'DNA' had by the mid-1990s acquired a sheen of scientific glamour potent enough to sell almost anything, and Bijan had grasped that the molecule's cachet could be decanted into a perfume bottle without troubling to include the molecule. The committee honoured the achievement as a triumph of branding over biochemistry. The fragrance sold. The double helix, unpaid for its likeness, made no comment.

Ig Nobel Prize in Dentistry

Waxed, Unwaxed, and the Truth About Flossing

Robert H. Beaumont

Robert H. Beaumont was awarded the Dentistry prize for a study addressing a question that divides bathroom cabinets everywhere: do patients prefer waxed or unwaxed dental floss? He surveyed them, tallied the preferences, and published the result with the earnest thoroughness the subject had never previously attracted. It sounds like the very archetype of trivial research, and yet compliance is the central problem of dental hygiene — the best floss is the one a person will actually use — and knowing what patients prefer is a genuine, if modest, step toward getting them to floss at all. The committee honoured the work with a straight face. Somewhere between the waxed and the unwaxed lies a small truth about the gap between what is good for us and what we can be persuaded to do.

Ig Nobel Prize in Literature

A Comprehensive Review of an Unlikely Literature

David B. Busch · James R. Starling

David B. Busch and James R. Starling were awarded the Literature prize for a scholarly paper titled 'Rectal Foreign Bodies: Case Reports and a Comprehensive Review of the World's Literature' — a survey which, as advertised, catalogued with clinical composure the remarkable and various objects that had presented themselves to emergency departments lodged in places evolution had not designed them to go. The paper is a genuine contribution to surgical practice: physicians confronted with such a case benefit enormously from a systematic account of what has been encountered before and how it was safely retrieved. It is also, sentence for sentence, among the more quietly astonishing documents in the medical canon. The committee honoured its comprehensiveness. The word 'comprehensive,' in the title, is doing a great deal of dignified work.

Ig Nobel Prize in Nutrition

Coffee, Improved by a Civet's Gut

John Martinez

John Martinez, a coffee merchant, was awarded the Nutrition prize for bringing to market kopi luwak — the world's most expensive coffee, distinguished by a production method that most marketers would have buried rather than advertised. The beans are eaten by the luak, a civet-like Southeast Asian mammal, passed through its digestive tract, recovered from its droppings, cleaned, and roasted, the animal's enzymes having allegedly worked some improving alchemy on the flavour along the way. Connoisseurs paid extraordinary sums for the result. The committee honoured the enterprise for its demonstration that there is, apparently, no stage of the digestive process that cannot be turned into a luxury good, provided the marketing is confident and the customer does not dwell too long on the specifics.

Ig Nobel Prize in Peace

Fists Instead of Armies

The Taiwan National Parliament

The Ig Nobel committee awarded the 1995 Peace prize to the members of Taiwan's Legislative Yuan, who had lately taken to settling their political differences through the direct application of fists, feet, and the occasional thrown object, providing the world's television cameras with reliably vigorous footage of democracy in its more physical mode. The citation honoured the legislators for demonstrating that politicians gain more by punching, kicking, and gouging one another than by waging war on other nations — which, read one way, is an argument for parliamentary brawling as a mature substitute for armed conflict. It is difficult to be entirely sure the committee was joking. Better a bruised colleague than a bombed city, and the Legislative Yuan, whatever its decorum, had never invaded anyone.

Turing Award

Building the Rules Cryptography Runs On

ACM A.M. Turing Award

Manuel Blum

Manuel Blum's career is a sustained argument that the most practically consequential place to apply mathematical rigour is exactly where it seems most abstract. He was among the architects of computational complexity theory — the branch of computer science that asks not just whether a problem can be solved, but how hard solving it is, and whether some problems are so hard that they cannot be efficiently solved at all. He then turned this machinery on cryptography, helping establish formal definitions of what it means for an encryption scheme to be secure, and on program checking, developing methods for verifying that a computation has been done correctly without re-running it from scratch. His work on pseudorandom number generators — sequences that look random to any efficient algorithm, even though they are not — underlies much of modern cryptographic practice. The Turing Award committee noted that he had built foundations; the internet uses them every day.

First exoplanet around a sun-like star confirmed

A Gas Giant, Four Days from Its Star

On 6 October 1995, Michel Mayor and Didier Queloz of the Geneva Observatory announced in Nature that they had found a planet orbiting 51 Pegasi, a sun-like star about fifty light-years away in Pegasus — and that the planet, half the mass of Jupiter, completed its orbit every 4.23 days. This implied it was circling its star at roughly one-twentieth the distance between Earth and the Sun, well inside where Mercury orbits ours, which was a problem, because every existing model of planetary formation held that gas giants could only form in the cold outer reaches of a solar system where ices could condense. Either the models were wrong, or Mayor and Queloz were wrong. The models were wrong. The discovery opened the concept of 'hot Jupiters' — gas giants that had formed far out and migrated inward — and upended the assumption that our own solar system was a plausible template for others. Mayor and Queloz eventually received the Nobel Prize in Physics in 2019, a quarter-century after the announcement, when there was no longer any doubt that they had permanently altered the picture of the cosmos.

Top quark discovered at Fermilab

The Standard Model's Last Missing Quark

The Standard Model of particle physics had been predicting the top quark since the mid-1970s, when its existence was implied by the symmetry structure of the other quarks, but it was not until 2 March 1995 that the CDF and D0 collaborations at Fermilab announced they had found it. The delay was explained by its mass: the top quark weighs roughly 173 GeV — as heavy as an atom of gold, and about forty times heavier than the bottom quark it was supposed to partner — which meant that only the most powerful particle accelerator then available, the Tevatron, could produce enough collision energy to create it. It decays in roughly 5 × 10⁻²⁵ seconds, too fast to form a bound state with anything, making its properties peculiarly clean to measure once you have found it. The discovery completed the matter sector of the Standard Model, the six quarks now all accounted for, and the only mystery left was why the heaviest one had chosen to be so inconveniently heavy.

First sequencing of a free-living organism's complete genome

A Bacterium, Read End to End

In July 1995, a team at The Institute for Genomic Research led by Claire Fraser and J. Craig Venter published in Science the complete genome of Haemophilus influenzae — 1,830,137 base pairs, 1,743 protein-coding genes, the first time a free-living organism's full DNA had been read from end to end. The method they used was whole-genome shotgun sequencing: shatter the genome into random fragments, sequence them all in parallel, then use computational assembly to piece the jigsaw back together from the overlaps. The approach had been considered too error-prone by many in the field; critics had argued that a more systematic, mapped approach was the only reliable path. The H. influenzae paper demonstrated otherwise, completing the sequence in a year and setting the template that would be used — refined and massively parallelised — for the Human Genome Project and, eventually, for the industrial-scale sequencing that has since become routine. Everything that followed in genomics traces back, in method if not in spirit, to reading this particular bacterium.

First HIV protease inhibitor approved

A Death Sentence Becomes a Managed Condition

Through the 1980s and into the early 1990s, an HIV diagnosis was, in most of the world, a slow death sentence, the virus replicating until the immune system could no longer hold pathogens at bay and some opportunistic infection finished the work. In December 1995, the FDA approved saquinavir — the first antiretroviral to block HIV's protease enzyme, which the virus needs to assemble functional copies of itself — developed by Roche after researchers had solved the protease's crystal structure and used it to design molecules that fit the active site like a key in a lock. Ritonavir and indinavir followed within months; combining three drugs from different classes, an approach called HAART, suppressed the virus in many patients to levels below detection. AIDS wards that had been bracing for another year of overwhelming mortality began, carefully at first, to cautiously measure something that looked like survival. The transformation was not universal — access to treatment remained catastrophically unequal across the world — but for those who reached it, the protease inhibitors changed a death sentence into a managed condition.

Wiles's proof of Fermat's Last Theorem published

The Margin Finally Got Its Proof

Pierre de Fermat scrawled in the margin of his copy of Diophantus, sometime around 1637, that he had found a truly marvellous proof that no three positive integers can satisfy aⁿ + bⁿ = cⁿ for any integer n greater than 2 — and that the margin was too narrow to contain it. The note was discovered after his death, and for 358 years it served as mathematics' most irritating provocation, defeating every serious attempt. Andrew Wiles encountered the problem as a ten-year-old in a Cambridge library and spent most of his professional career finding a way to it, working in secrecy in his attic for seven years, emerging in 1993 to announce a proof that wove together elliptic curves, modular forms, and Galois representations in ways Fermat had certainly not possessed. A gap appeared in the proof during review; Wiles spent another year with his former student Richard Taylor closing it, and the corrected version was published in the May 1995 Annals of Mathematics — occupying the entire issue. Whether Fermat had any proof at all remains unknown, and somewhat beside the point.

Galileo probe enters Jupiter's atmosphere

Fifty-Seven Minutes Inside a Gas Giant

The Galileo spacecraft had been travelling since October 1989, dispatched on an indirect route via Venus and two passes of Earth to build up enough speed to reach Jupiter — a six-year journey punctuated by the discovery that its main high-gain antenna had failed to deploy, forcing the mission team to redesign the entire data-return strategy around a smaller antenna at a fraction of the planned bandwidth. On 7 December 1995, the atmospheric probe it had been carrying separated and plunged into Jupiter at 47 kilometres per second, decelerating at 230g before deploying a parachute and transmitting data for 57 minutes while descending through the clouds. It found winds exceeding 600 km/h at 22 kilometres depth, far less water than models had predicted (possibly because it entered an anomalously dry hot-spot region), and far more helium than expected at that depth. The probe was eventually crushed by pressure; the orbiter, arriving simultaneously, spent eight years studying Jupiter's moons, finding strong evidence for a liquid water ocean beneath Europa's ice — which has since become one of the most discussed possible habitats for life beyond Earth.

Java programming language released publicly

Write Once, Run (Almost) Anywhere

Java began, in the early 1990s, as a project called Oak at Sun Microsystems, designed for programming consumer electronics — set-top boxes, handheld devices — where you could not know in advance what processor the code would run on. The solution was a virtual machine: instead of compiling to machine code for a specific chip, Java compiled to bytecode for an imaginary machine, and the real machine ran that. The consumer electronics market failed to materialise, but the World Wide Web did, and Sun recognised that a language that ran on any platform without recompilation was exactly what web developers needed. At SunWorld on 23 May 1995, the language was unveiled under the slogan 'write once, run anywhere.' The promise was approximately kept — 'write once, debug everywhere' became the more experienced practitioner's version — and Java went on to become one of the most widely deployed languages in history, the backbone of Android applications, enterprise systems on six continents, and rather more university computer science curricula than strictly necessary.