1900 Planck proposes quantum theory.
1901 Alzheimer identifies ‘presenile dementia’.
1902 Pusey reports 1st use of radiation to treat malignancies.
1903 Einthoven invents 1st practical electrocardiogram.
1903 Osler describes Polycythaemia Vera (pictured).
1905 Einstein publishes theory of Special Relativity.
1906 Hopkins suggests existence of vitamins & concludes they are essential to health.
1906 Bateson coins term ‘genetics’.
1906 French scientists Carnot & Deflandre suggest existence of a humoral factor that stimulates red blood cell production.