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22 figures

Leonardo da Vinci

1452 – 1519

Proved that art and science are one act of looking.

Italy·Engineering · Biology · Astronomy · LiteratureFull profile

Andreas Vesalius

1514 – 1564

Dissected humans himself and corrected Galen; founded modern anatomy.

Belgium·Medicine · Biology

Jan Baptist van Helmont

1580 – 1644

Coined 'gas' and ran the first quantitative plant-growth experiment.

Belgium·Chemistry · Biology

Antonie van Leeuwenhoek

1632 – 1723

Ground lenses in a draper's shop and discovered the microbial world.

Netherlands·Biology

Carl Linnaeus

1707 – 1778

Binomial nomenclature: every species on Earth still carries his two-name system.

Sweden·Biology

Johann Wolfgang von Goethe

1749 – 1832

A poet who also did serious science, and defined what a modern European is.

Germany·Literature · Biology · PhilosophyFull profile

Alexander von Humboldt

1769 – 1859

Invented the idea that nature is a single connected web — and that we can wreck it.

Germany·Biology · Astronomy · HistoryFull profile

Charles Darwin

1809 – 1882

Explained the whole of life with one mechanism: descent with modification.

United Kingdom·BiologyFull profile

Louis Pasteur

1822 – 1895

Proved that invisible organisms cause disease — and that we can beat them.

France·Chemistry · Medicine · BiologyFull profile

Gregor Mendel

1822 – 1884

Pea plants in a monastery garden gave the world genetics.

Czech Republic·Biology

Camillo Golgi

1843 – 1926

The silver stain that made neurons visible.

Italy·Medicine · BiologyNobel

Santiago Ramón y Cajal

1852 – 1934

Founded neuroscience by drawing the neuron doctrine.

Spain·Medicine · BiologyNobel

Marie Stopes

1880 – 1958

Opened Britain's first birth-control clinic; the charity still operates in 37 countries.

United Kingdom·Medicine · Biology

Alexander Fleming

1881 – 1955

Penicillin; antibiotics have saved an estimated 200 million lives.

United Kingdom·Medicine · BiologyNobel

Nikolai Vavilov

1887 – 1943

Built the world's first seed bank; starved to death in Stalin's prison.

Russia·Biology

Erwin Schrödinger

1887 – 1961

Wave mechanics and What Is Life?, which inspired the DNA hunters.

Austria·Physics · BiologyNobel

Rita Levi-Montalcini

1909 – 2012

Discovered nerve growth factor in a bedroom lab under fascist persecution.

Italy·Medicine · BiologyNobel

Alan Turing

1912 – 1954

Defined what a computer is, then was destroyed by the country he saved.

United Kingdom·Mathematics · Computing · BiologyFull profile

Alan Hodgkin & Andrew Huxley

1914 – 1998

Explained the nerve impulse in mathematical terms.

United Kingdom·Medicine · BiologyNobel

Francis Crick

1916 – 2004

Co-described the double helix and the central dogma of molecular biology.

United Kingdom·BiologyNobel

Rosalind Franklin

1920 – 1958

Photographed the shape of the molecule that makes us.

United Kingdom·Chemistry · BiologyFull profile

Katalin Karikó

b. 1955

Demoted, defunded, and right: her mRNA work produced the COVID vaccines.

Hungary·Medicine · Biology · ChemistryNobelFull profile