Post any you think I’ve missed in the comments!

Mathematics

Paper – Duncan J. Watts & Steven H. Strogatz – Collective dynamics of ‘small-world’ networks – 45000

Physics

• Eratosthenes’s measurement of Earth’s circumference
• Michelson’s Speed of Light
• Becquerel’s discovery of radiation
• Toyabe’s ‘Bead Staircase’
• Jai Singh II and Jantar Mantar
• Antikythera mechanism

Chemistry

• Haber-Bosch Process – Quadrupled population, uses 1-2% of world’s energy
• Millikan’s Oil Drop

Biology

• Fleming and Penicillin

Psychology

• The Marshmellow Test
• Milgram Experiment

Sociology

• Stanford Prison