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TechniCalc is an alliance of sites devoted to the use of handheld computers and calculators in industry and academics.

Practical information on permaculture, self-sufficiency, organic farming and gardening, alternative energy. The emphasis is on practical, positive steps we can all take to improve our world.A collaborative effort by subscribers of the…

This site is based around Celestia, a free, 3-D, real-time space simulator. Celestia is an awesome experience for anyone interested in physics, astronomy, or cosmology. The Motherlode is a collection of surface textures, models and astronomical data,…

La Facultad de Ciencias Naturales y Museo ha contado con publicaciones propias desde sus orígenes. Durante más de cien años acompañaron la labor científica, siendo el principal elemento de difusión del…

An animated 3D generalization of John Conway's Game of Life written in Java, with examples.

Interactive 3D VRML models of crystal with cubic symmetry (Si, GaAs, NaCl and others)

EcoAccess helps you find and share environmental information online, providing access to the knowledge you need to make informed decisions about environmental issues.

Information about Tibetan ecology and effects on it of Chinese occupation.