Did you know? · 581 facts

Science & Medicine

Physics, chemistry, immunology, genetics, the discoveries that reshaped how the world heals and understands itself.

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Facts

Science & Medicine

Fritz Haber linked electrochemistry to industry

Fritz Haber's 1898 textbook on technical electrochemistry and his discovery that controlling electrode potential yields specific products became classics of the field.

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Science & Medicine

Fritz Haber invented a whistle to protect miners

In 1913 Fritz Haber unveiled a firedamp whistle that used sound to warn miners of explosive methane, and he also devised a quartz-thread gauge for very low gas pressures.

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Science & Medicine

Fritz Haber made ammonia from the air in 1909

In 1909 Fritz Haber and Robert Le Rossignol became the first to synthesise ammonia from nitrogen and hydrogen, solving a problem chemists had pursued for decades.

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Science & Medicine

Fritz Haber wrote a model book on gas reactions

Fritz Haber's 1905 book Thermodynamics of Technical Gas Reactions was later regarded as a model of accuracy and critical insight in chemical thermodynamics.

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Science & Medicine

Fritz Lipmann explained ATP as the cell’s energy currency and found coenzyme A

Fritz Lipmann showed in 1941 that cells store and spend energy through the ‘energy-rich’ phosphate bonds of ATP, then discovered coenzyme A, the molecule that links the breakdown of food to the building of fats and cholesterol.

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Science & Medicine

Gabriel Lippmann captured colour with the physics of light

In 1891 Gabriel Lippmann announced the first photographs to record colour directly through light interference, a method that foreshadowed holography and won him the 1908 Nobel Prize in Physics.

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Science & Medicine

Gabriel Lippmann’s mercury tube recorded the first human heartbeat trace

Gabriel Lippmann’s capillary electrometer, a hair-thin tube of mercury that moves with tiny voltages, was the instrument Augustus Waller used in 1887 to record the first electrocardiogram of a human heart.

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Science & Medicine

Gary Ruvkun helped discover microRNA, a hidden layer of gene control

Gary Ruvkun showed how a tiny RNA switches off a gene and then found let-7, the first microRNA shared with humans, revealing a system of gene control now studied for cancer diagnosis and treatment.

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Science & Medicine

George Dantzig invented the simplex method for finding the best plan

In 1947 George Dantzig invented the simplex method of linear programming, a way to find the cheapest or most productive plan among countless possibilities that is now used in airlines, refineries, factories, power systems and food production.

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Science & Medicine

George de Hevesy traced lead through a bean plant

In 1923 George de Hevesy published the first use of a radioactive tracer in a living organism, following lead-212 through the roots, stems and leaves of broad beans.

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Science & Medicine

George de Hevesy co-discovered the element hafnium

Guided by Niels Bohr's atomic theory, George de Hevesy and Dirk Coster found the missing element 72 in Copenhagen and named it hafnium, after the city's Latin name.

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Science & Medicine

George de Hevesy hid colleagues' Nobel medals in acid

When the Nazis invaded Denmark, chemist George de Hevesy dissolved two colleagues' gold Nobel medals in acid to protect them; after the war the gold was recovered and the medals recast.

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Science & Medicine

George de Hevesy ran the first radioactive tracer experiment

In early 1913, with Friedrich Paneth at the Vienna Institute for Radium Research, George de Hevesy carried out the first radioactive-tracer experiment.

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Science & Medicine

George de Hevesy used isotopes to study cancer

After fleeing to Sweden in 1943, George de Hevesy used labelled atoms to study how X-rays affect nucleic acids in tumours and how iron moves in healthy and cancerous tissue.

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Science & Medicine

George de Hevesy invented neutron activation analysis

In 1936 George de Hevesy invented neutron activation analysis, identifying tiny traces of elements by bombarding a sample with neutrons and measuring the radioactivity produced.

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Science & Medicine

George de Hevesy developed X-ray fluorescence analysis

With Rockefeller Foundation support, George de Hevesy developed X-ray fluorescence analysis, a way to identify the elements in a sample from the X-rays they emit.

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Science & Medicine

George Olah’s plan to turn carbon dioxide into fuel

George Olah proposed the “methanol economy,” in which carbon dioxide captured from smokestacks or the air is recycled into methanol fuel, and a pioneering Icelandic plant that does this bears his name.

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Science & Medicine

George Olah’s superacids helped make cleaner fuel

By using superacids to trap carbocations long enough to study them, George Olah unlocked chemistry that refiners use to make higher-octane, cleaner-burning petrol.

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Science & Medicine

George Wald showed why vitamin A lets us see in the dark

By finding vitamin A inside the retina and tracing how light changes it, George Wald explained night blindness and mapped the chemistry of sight that eye medicine still uses.

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Science & Medicine

Georges Charpak brought hands-on science to French primary schools

Shocked that few French primary schools taught science, Georges Charpak co-founded La main à la pâte in 1996, a programme that helps teachers teach science through experiments and has spread to many countries.

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Science & Medicine

Georges Charpak’s particle detector led to low-dose X-rays

Georges Charpak’s wire chamber, invented to track particles at CERN, became the heart of the EOS imaging system, which takes full-body X-rays of standing patients with far less radiation.

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Science & Medicine

Gerald Edelman revealed what antibodies are made of

Gerald Edelman split antibodies into their chains and in 1969 published the first complete sequence of an antibody, showing how the immune system’s key molecules recognise invaders.

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Science & Medicine

Gertrude Elion's 6-MP gave children with leukaemia a chance

In the early 1950s Gertrude Elion synthesised 6-mercaptopurine, one of the first effective drugs against acute leukaemia, then almost always fatal in children.

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Science & Medicine

Elion's team created acyclovir, a pioneering antiviral

In the 1970s Gertrude Elion's group developed acyclovir, the first selective and effective antiviral drug, which attacks herpes viruses while sparing healthy cells.

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Science & Medicine

Gertrude Elion's allopurinol still treats gout today

Allopurinol, developed in Gertrude Elion's laboratory, blocks the build-up of uric acid and remains a mainstay treatment for gout.

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Science & Medicine

Elion's azathioprine made kidney transplants workable

Gertrude Elion's laboratory produced azathioprine, the first widely used drug to stop the body rejecting a transplanted kidney from an unrelated donor.

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Science & Medicine

Researchers Elion trained helped develop AZT

After Gertrude Elion retired in 1983, scientists she had trained, using her methods, developed AZT, one of the first drugs used to treat HIV/AIDS.

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Science & Medicine

Elion's chemistry also fought malaria and infections

Gertrude Elion's work with George Hitchings contributed to pyrimethamine against malaria and trimethoprim against bacterial infections.

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Science & Medicine

Gertrude Elion spent her later years mentoring students

From 1971 Gertrude Elion taught at Duke University, mentoring medical and graduate students and publishing more than 25 papers with them.

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Science & Medicine

Gertrude Elion won a Nobel Prize without a doctorate

Turned away from graduate funding, Gertrude Elion never completed a PhD, yet her rational drug design produced leukaemia, transplant and antiviral drugs and won the 1988 Nobel Prize.

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Science & Medicine

Gerty Cori mapped how the body stores and uses sugar

Gerty and Carl Cori worked out how sugar travels between muscles and liver, the Cori cycle, and found the first step in breaking down the body’s sugar stores, earning the 1947 Nobel Prize.

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Science & Medicine

Gerty Cori proved a missing enzyme can cause disease

In 1952 Gerty Cori showed that children with one form of glycogen storage disease lack a single liver enzyme, the first proof that an enzyme defect can cause a human disease.

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Science & Medicine

Gregory Pincus founded a leading hormone conference

In 1944 Gregory Pincus organised the Laurentian Hormone Conference and edited its first 23 volumes of proceedings, a key forum for endocrinology.

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Science & Medicine

Gregory Pincus fertilised rabbit eggs in glass in 1934

In 1934, at 31, Gregory Pincus achieved in vitro fertilisation of rabbit eggs, more than four decades before the first human IVF baby.

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Science & Medicine

Gregory Pincus developed the birth control pill

Working from a struggling independent lab, Gregory Pincus led the research that produced the first oral contraceptive, approved by the US FDA in 1960.

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Science & Medicine

Pincus studied stress in wartime pilots

During the Second World War Gregory Pincus and Hudson Hoagland studied stress and fatigue for the US Navy and air forces, measuring hormones in pilots.

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Science & Medicine

Pincus built a world centre for hormone research

The Worcester Foundation, co-founded by Gregory Pincus in 1944, became an international centre for steroid hormone research, hosting over 300 foreign scientists.

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Science & Medicine

David Politzer found the key to the theory of the strong force

As a 23-year-old Harvard graduate student, H. David Politzer showed in 1973 that the force between quarks weakens when they are close together, the discovery that made quantum chromodynamics work.

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Science & Medicine

H. Robert Horvitz found the genes that tell cells when to die

By studying a millimetre-long worm, H. Robert Horvitz discovered the genes that control programmed cell death, a pathway that cancer drugs such as venetoclax now switch back on to kill leukaemia cells.

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Science & Medicine

Hans Bethe championed peaceful nuclear energy

Throughout the 1980s and 1990s Hans Bethe campaigned for the peaceful use of nuclear energy, calling nuclear electricity 'a necessity, not merely an option'.

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Science & Medicine

Hans Bethe's 1931 method still solves quantum puzzles

While working with Enrico Fermi in Rome in 1931, Hans Bethe devised the Bethe ansatz, a method for exactly solving certain quantum many-body problems.

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Science & Medicine

'Bethe's Bible' taught a generation nuclear physics

In 1936–37 Hans Bethe, with Robert Bacher and Stanley Livingston, wrote three review articles so complete they became known as 'Bethe's Bible'.

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Science & Medicine

Hans Bethe explained how the stars shine

In 1938–39 Hans Bethe worked out the nuclear reactions that power the Sun and stars, work that won him the 1967 Nobel Prize in Physics.

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The Bethe formula tracks radiation through matter

In 1930 Hans Bethe derived a formula for how fast charged particles lose energy passing through matter, still used across physics today.

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Science & Medicine

Bethe showed missile defence could be fooled by decoys

In 1968 Hans Bethe and Richard Garwin argued that missile defences could be defeated by simple decoys, an argument that helped lead to the 1972 ABM Treaty.

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Science & Medicine

Hans Bethe helped secure the 1963 Test Ban Treaty

Hans Bethe served on the President's Science Advisory Committee from 1956 to 1964 and helped bring about the 1963 treaty banning atmospheric nuclear tests.

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Science & Medicine

Hans Bethe cracked the Lamb shift on a train

In 1947, on a train to Schenectady, Hans Bethe calculated the Lamb shift, showing quantum electrodynamics could work and opening modern particle physics.

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Science & Medicine

At 85, Hans Bethe helped solve the solar neutrino puzzle

At the age of 85, Hans Bethe wrote an important paper on the solar neutrino problem, helping establish that neutrinos change type on their way from the Sun.

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Science & Medicine

Hans Krebs found how cells turn food into energy

In 1937, four years after the Nazis dismissed him, Hans Krebs worked out the citric acid cycle, the chain of reactions by which almost every living cell turns food into energy.

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Science & Medicine

Harold Varmus showed that cancer genes come from our own normal genes

In 1976 Harold Varmus and J. Michael Bishop discovered that a cancer-causing gene carried by a virus was really a normal cell gene, revealing that cancer arises from damage to genes we all carry.

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Science & Medicine

Harold Varmus helped make medical research free for anyone to read

As director of the National Institutes of Health, Nobel laureate Harold Varmus helped create PubMed Central, a free online library of research papers, and co-founded the open-access publisher PLOS.

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Science & Medicine

The buckyball that launched carbon nanoscience

In 1985 Harry Kroto and colleagues discovered C60, a football-shaped cage of carbon atoms, revealing a new form of carbon and opening the road to nanotubes and graphene.

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Science & Medicine

Harry Kroto gave the world free science films and lessons

Nobel chemist Harry Kroto founded the Vega Science Trust and GEOSET to put high-quality science films and lessons online free for anyone, anywhere.

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Science & Medicine

Harry Markowitz developed buddy memory allocation

Harry Markowitz developed the buddy memory allocation method, included in the first version of his SIMSCRIPT language, a technique for managing computer memory.

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Science & Medicine

Harry Markowitz showed how to compute efficient portfolios

Harry Markowitz developed the critical line algorithm, published in 1956, to compute the efficient frontier, the set of portfolios giving the best return for each level of risk.

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Science & Medicine

Harry Markowitz created the SIMSCRIPT simulation language

In the early 1960s Harry Markowitz returned to RAND to develop SIMSCRIPT, a programming language that made computer simulations much faster to build.

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Science & Medicine

Harry Markowitz pioneered sparse matrix computing

At RAND in the 1950s Harry Markowitz saw that big economic models were mostly zeros, and devised sparse matrix techniques now standard for solving huge systems of equations.

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Science & Medicine

Harvey Alter tracked down the hidden virus in transfused blood

By following transfusion patients and storing their blood for years, NIH physician Harvey Alter proved that an unknown virus, later named hepatitis C, was causing most hepatitis after transfusions, work that led to blood screening and, eventually, a cure.

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Science & Medicine

Henri Kagan helped chemists make the right mirror image of a drug

Henri Kagan, a French Jewish chemist who survived the war in hiding as a child, created catalysts, reagents and insights that help chemists produce the single mirror-image form of a medicine, the form that works.

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Science & Medicine

Henri Moissan isolated fluorine and showed how to make it

On June 26, 1886, Henri Moissan became the first person to isolate the element fluorine, using an electrolytic method that is still the basis of commercial fluorine production.

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On kindness & the treatment of others
“A friend is devoted at all times; a brother is born to share adversity.”
Proverbs 17:17