"Arithmetic, Population and Energy" - a talk by Albert Bartlett on the impossibility of exponential growth on a finite planet - here. Albert A. Bartlett (1923-2013) was Professor Emeritus in Nuclear Physics at University of Colorado at Boulder. He was a member of the faculty of the University of Colorado since 1950.
Naturaleza y Matemáticas. Relieves.
Fotografías aéreas de la Tierra. Río Purus. Amazonia.
