{"id":13327,"date":"2024-05-09T12:00:00","date_gmt":"2024-05-09T12:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/sao-tome-e-principe\/politique\/restaurer-des-fossiles-un-puzzle-en-3d-de-plusieurs-millions-dannees"},"modified":"2024-05-09T22:34:54","modified_gmt":"2024-05-09T22:34:54","slug":"restaurer-des-fossiles-un-puzzle-en-3d-de-plusieurs-millions-dannees","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/restaurer-des-fossiles-un-puzzle-en-3d-de-plusieurs-millions-dannees","title":{"rendered":"Restaurer des fossiles, un \u201cpuzzle\u201d en 3D de plusieurs millions d\u2019ann\u00e9es"},"content":{"rendered":"

Africa-Press – S\u00e3o Tom\u00e9 e Pr\u00edncipe. <\/strong><\/span>Assembler un \u201cpuzzle en 3D\u201d, mais avec des pie\u0300ces qui ont plusieurs millions d\u2019anne\u0301es. C\u2019est ainsi que Lauren McClain de\u0301crit sa mission: nettoyer et reconstituer de ses mains expertes les fossiles de dinosaures avant de les voir tro\u0302ner dans les plus grands muse\u0301es.<\/p>\n

Dans son atelier installe\u0301 a\u0300 domicile, au nord-est de Houston (Texas), cette restauratrice ame\u0301ricaine utilise une sorte de mini-perceuse connecte\u0301e a\u0300 un compresseur, un peu comme un outil de dentiste, pour retirer avec une extre\u0302me pre\u0301caution des particules de terre de fossiles de\u0301passant les 60 millions d\u2019anne\u0301es.<\/p>\n

Pour reconstituer un fe\u0301mur de Tyrannosaure, un tibia de Trice\u0301ratops ou des dents de Me\u0301galodon, elle doit aussi souvent modeler les parties manquantes.<\/p>\n

\u201cLes gens me disent: +Tu dois e\u0302tre forte en puzzle+. Mais en re\u0301alite\u0301 c\u0327a ne me plai\u0302t pas trop, sauf quand il s\u2019agit d\u2019un puzzle en 3D qui va devenir un dinosaure\u201d, s\u2019amuse Mme McClain, 33 ans.<\/p>\n

<\/p>\n

\u201cQuand tu as quelque chose comme une centaine de pie\u0300ces, tu dois vraiment e\u0301tudier chaque bord et voir comme ils s\u2019alignent pour reconstituer dans les moindre de\u0301tails ce qui existait avant\u201d, dit-elle.<\/p>\n

Elle a de\u0301ja\u0300 travaille\u0301 sur un fossile d\u2019Eurypte\u0301ride, couramment appele\u0301 scorpion de mer, vieux de 200 millions d\u2019anne\u0301es.<\/p>\n

Ces espe\u0300ces habitaient anciennement les terres qui ont forme\u0301 l\u2019Ame\u0301rique du Nord. Le Montana, les deux Dakota, le Colorado, la Floride ou la Californie sont des terrains de jeu connus pour les chercheurs de fossiles.<\/p>\n

\u2013 Fe\u0301mur d\u20191,30 m \u2013<\/b><\/p>\n

Lauren McClain est une passionne\u0301e. Fan de la saga Jurassic Park depuis l\u2019enfance, elle s\u2019est marie\u0301e dans le muse\u0301e des Sciences naturelles de Houston.<\/p>\n

<\/p>\n

Elle a entame\u0301 sa carrie\u0300re professionnelle comme graphiste mais a en paralle\u0300le commence\u0301 a\u0300 participer a\u0300 des fouilles.<\/p>\n

Avec l\u2019aide de mentors et de pale\u0301ontologues professionnels, elle s\u2019est aventure\u0301e dans le cre\u0301neau de la restauration et a monte\u0301 sa socie\u0301te\u0301 Big Sky Fossils.<\/p>\n

L\u2019an dernier, elle a de\u0301finitivement renonce\u0301 a\u0300 son travail de bureau pour se consacrer a\u0300 plein temps aux fossiles.<\/p>\n

Elle restaure actuellement un fe\u0301mur de hadrosauride\u0301 qu\u2019elle a du\u0302 installer dans son garage, faute de place suffisante dans son atelier. L\u2019os mesure 1,30 m, pas tre\u0300s loin de son me\u0300tre 60.<\/p>\n

Pour ce faire, elle inse\u0300re une tige de me\u0301tal dans l\u2019os afin de lui donner de la stabilite\u0301.<\/p>\n

Apre\u0300s un lavage minutieux, elle assemble les pie\u0300ces avec une colle forte et utilise un mastic e\u0301poxy pour bouger les espaces creux.<\/p>\n

Pour finir, il lui faudra peindre avec une couleur proche de l\u2019original.<\/p>\n

\u201cLes pie\u0300ces manquantes, c\u2019est la partie la plus difficile du travail car il s\u2019agit non seulement de bien comprendre l\u2019anatomie d\u2019un dinosaure particulier mais aussi d\u2019avoir une bonne re\u0301fe\u0301rence, et ce n\u2019est pas facile d\u2019en trouver une. J\u2019e\u0301change avec de nombreux pale\u0301ontologues pour bien faire\u201d, de\u0301taille Lauren McClain.<\/p>\n

\u2013 Compe\u0301tences tre\u0300s pointues \u2013<\/b><\/p>\n

Spe\u0301cialiste de pale\u0301ontologie au muse\u0301e des Sciences naturelles de Houston, David Temple assure qu\u2019a\u0300 cause de ce qu\u2019ils voient dans les films, les gens croient qu\u2019on retrouve les fossiles intacts dans le sol.<\/p>\n

<\/p>\n

\u201cLa re\u0301alite\u0301 est tout autre. Chaque fossile a besoin d\u2019un certain degre\u0301 de soin, de restauration et de consolidation car le simple fait de l\u2019extraire du sol l\u2019abi\u0302me\u201d, explique-t-il a\u0300 l\u2019AFP dans les couloirs du muse\u0301e.<\/p>\n

Une fois reconstitue\u0301s, les fossiles servent aussi a\u0300 fabriquer des re\u0301pliques qui seront e\u0301galement expose\u0301es.<\/p>\n

\u201cNombre de pale\u0301ontologues pre\u0301parent eux-me\u0302mes leurs fossiles mais pas tous, car ils n\u2019ont pas la patience ou le temps. Ils reconnaissent que les gens qui font c\u0327a ont des compe\u0301tences tre\u0300s pointues\u201d, dit encore M. Temple.<\/p>\n

\u201cPrenez nos trilobites (des arthropodes marins disparus, ndlr): peu de gens au monde savent les restaurer. C\u2019est un art difficile a\u0300 apprendre\u201d, assure-t-il.<\/p>\n

\u201cParfois, quand ils assemblent des e\u0301le\u0301ments qui ne s\u2019emboi\u0302tent pas tout a\u0300 fait, ces spe\u0301cialistes s\u2019amusent a\u0300 dire qu\u2019ils ont invente\u0301 une +nouvelle espe\u0300ce+\u201d, ironise le conservateur.<\/p>\n

Pour plus d’informations et d’analyses sur la S\u00e3o Tom\u00e9 e Pr\u00edncipe<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – S\u00e3o Tom\u00e9 e Pr\u00edncipe. Assembler un \u201cpuzzle en 3D\u201d, mais avec des pie\u0300ces qui ont plusieurs millions d\u2019anne\u0301es. C\u2019est ainsi que Lauren McClain de\u0301crit sa mission: nettoyer et reconstituer de ses mains expertes les fossiles de dinosaures avant de les voir tro\u0302ner dans les plus grands muse\u0301es. Dans son atelier installe\u0301 a\u0300 domicile, […]<\/p>\n","protected":false},"author":82,"featured_media":13326,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,55,56],"class_list":["post-13327","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-sao-tome-e-principe","tag-sao-tome-e-principe"],"yoast_head":"\nRestaurer des fossiles, un \u201cpuzzle\u201d en 3D de plusieurs millions d\u2019ann\u00e9es - S\u00e3o Tom\u00e9 e Pr\u00edncipe<\/title>\n<meta name=\"description\" content=\"Assembler un \u201cpuzzle en 3D\u201d, mais avec des pie\u0300ces qui ont plusieurs millions d\u2019anne\u0301es. 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