N. Cretton
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Most of the material (pictures, figures, movies) on this site has been taken from the web: The copyrights belong therefore to the original sources (e.g., NASA, ESO, STScI, etc).

I am the owner of the pictures of my classes and of the panoramas pictures. You are free to use them, but I would appreciate an acknowledgment.

I would like to thank the Melcher Media publishing house, Chappatte and Mix & Remix for letting me use their drawings and materials. Most of the material (text and pictures) of the Global Warming posters has been taken from the book "The Live Earth, Global Warming Survival Handbook" by David de Rothschild (published by Rodale) with illustrations by William van Roden.