Métodos de Investigación
Comparación en la Investigacion Científica
Para Seguir Explorando
Fair tests in physics: Examining eclipses
A case study of research on general relativity that relies on comparison, from Understanding Science.
Fair tests in the fossil record: Avoiding extinction
A case study of research on extinction that relies on comparison, from Understanding Science.
Stanford University - An online exhibit of historical cigarette advertising.
BibliOdyssey - A collection of images from a first edition copy of Tyson's classic work.
Smoking and Carcinoma of the Lung (pdf)
Richard Doll & A. Bradford Hill (1950) - Full text of the article published in the British Medical Journal.
Google - Research database allows searching of the scholarly literature.
Next Generation Science Standards: For States, By States
National Academies Press: A Framework for K-12 Science Education