Mon petit cahier de sciences naturelles

synhtèse protéique en animation virtuelle

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quelques animations sur la synthèse protéique : vidéo vie intérieure de la cellule (8'11'') : http://www.youtube.com/watch?v=UB6G9GD2KFk originale chorégraphie sur synth protéique (13'11''): http://www.youtube.com/watch?v=u9dhO0iCLww&feature=related animation...

hadrosaur momifié

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Dinosaur of the day - mummified-o-saurus - December 03, 2007 A dinosaur complete with skin, tendons and perhaps even internal organs has been uncovered in the US. Although it is being billed as "mummified", the skin and tissues on this hadrosaur have...

le départ de la vie non dans une soupe mais en sandwich entre lames de micas

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Life between the (mica) sheets - December 05, 2007 The first life on Earth began in the protected spaces between sheets of mica. So says Helen Hansma, of the University of California, Santa Barbara. Presenting her hypothesis at this week's American Society...

photocopies

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photocopies

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photocopies

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recyclage

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Chaînon manquant

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galaxie Messier 74

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A Christmas card from Hubble - November 30, 2007 Today s pretty space picture is a new snap from the Hubble Space Telescope. This is spiral galaxy Messier 74, a feature that amateur astronomers find so hard to detect in the night sky that it has been...

histoire de sexe chez les antilopes

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Female antelope won't take no for an answer - November 30, 2007 You might think that being pursued by amorous females would please a male antelope no end. Not so, according to a paper published this week. Some males even resort to physical violence to...