Modern Synthesis, 1937
Modern Synthesis, 1937
Theodosius Dobzhansky’s work in population genetics influenced how genetics and natural selection were combined in evolutionary biology.
Modern Synthesis, 1937
Modern Synthesis, 1937

Theodosius Dobzhansky’s work in population genetics influenced how genetics and natural selection were combined in evolutionary biology.

Theodosius Dobzhansky’s work in population genetics influenced how genetics and natural selection were combined in evolutionary biology.

Foundations
Heel Prick, 1957
Heel Prick, 1957
Ashley Yeager | Jul 15, 2019
Robert Guthrie’s blood test for the metabolic disorder phenylketonuria launched a worldwide movement to screen every baby for the disease soon after birth.
Bovine Inoculations, circa 1870s
Bovine Inoculations, circa 1870s
Christopher DeCou | Jun 1, 2019
Lymph from cattle proved more effective at inducing immunity to smallpox than the older, person-to-person method.
Machine, Learning, 1951
Machine, Learning, 1951
Jef Akst | May 1, 2019
Marvin Minsky engineered the first known artificial neural network, in which “rats” represented as lights learned to solve a maze.
From Chemical Weapon to Chemotherapy, 1917–1946
From Chemical Weapon to Chemotherapy, 1917–1946
Carolyn Wilke | Apr 1, 2019
Mustard gas blistered men’s bodies on the battlefield, but paved the way for cancer-fighting drugs.
How Chromosomes X and Y Got Their Names, 1891
How Chromosomes X and Y Got Their Names, 1891
Joseph Keierleber | Mar 1, 2019
A quirk of nomenclature originates in the study of insect cells.
Flower Preservation, 1916
Flower Preservation, 1916
Catherine Offord | Feb 1, 2019
James Kirkham Ramsbottom saved Britain’s daffodil industry from a devastating parasite, only to be forgotten.
Painting Dinosaurs, early 20th century
Painting Dinosaurs, early 20th century
Diana Kwon | Jan 1, 2019
Charles R. Knight’s illustrations shaped the public’s view of prehistoric life.
Cranial Craters, 1000-1250
Cranial Craters, 1000-1250
Sukanya Charuchandra | Nov 1, 2018
Prehistoric Andeans seemed especially fond of trepanation—holes drilled in the skull as a treatment for various ills.
Charting Crescents, 1910
Charting Crescents, 1910
Sukanya Charuchandra | Oct 1, 2018
James Herrick, a Chicago doctor, was the first to describe sickled red blood cells in a patient of African descent.