Des cochons anglais viennent d’être équipés de composants électroniques biocompatibles capables d’adhérer aux tissus vivants: mis au point par des chercheurs de Cambridge, ces « plug-in » biologiques préfigurent une nouvelle génération d’appareils implantables à l’intérieur du corps, capables d’enregistrer et de contrôler l’activité des cellules et des organes.
Un chercheur de l’Université McGill de Montréal et des collaborateurs internationaux ont modifié les gènes d’un rat; créant ainsi le modèle idéal pour l’étude de la maladie d’Alzheimer chez l’humain.
Plus les taches sombres sont nombreuses à la surface de l’astre, plus ce dernier est actif. Et si le CO2 n’était pas le principal moteur de l’évolution du climat ? S’il n’en a pas encore la «preuve absolue», Vincent Courtillot, professeur à l’université Paris-Diderot et chercheur à l’Institut de physique du globe de Paris, est plus que jamais convaincu que
A bord du Generali Arctic Observer, Jean-Louis Etienne a décollé à 6h10 ce lundi matin de Longyearbyen, au Spitzberg, pour la première traversée du pôle Nord en ballon. Cette aventure aérienne représente le troisième volet de sa trilogie de l’Arctique réalisée d’abord à pied, puis en bateau et enfin dans les airs.
Lancement réussi de Discovery et son équipage de 7 astronautes à destination de la Station spatiale internationale pour la mission STS-131, de 13 jours, qui comptera trois sorties dans l’espace et livrera de nouvelles expériences scientifiques et de nouveaux équipements, dont une zone de couchage.
Deux télescopes en orbite terrestre viennent de découvrir le nuage de particules éjectées lors d’une explosion stellaire. Une poussière illuminée fortuitement par la présence d’un amas d’étoiles. A 20.000 années-lumière de nous, dans la constellation du Sagittaire, l’objet G54.1+03 est un pulsar comme on en observe de nombreux dans notre galaxie.
TOUTES LES CHRONIQUES VivelesSVT sur Zénith ICI Retrouvez le cours SVT : La contraception Zénith FM LE SITE Le site de la Matinale by Jérèm’
Les Sciences de la Vie et de la Terre au collège et au lycée. Découverte, actualité, cours, aide et soutien en ligne.
RÉVISIONS EXAMENS SVT DNB ET BAC
| Cookie | Durée | Description |
|---|---|---|
| cookielawinfo-checkbox-advertisement | 1 year | The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Advertisement". |
| cookielawinfo-checkbox-analytics | 1 year | This cookies is set by GDPR Cookie Consent WordPress Plugin. The cookie is used to remember the user consent for the cookies under the category "Analytics". |
| cookielawinfo-checkbox-necessary | 1 year | This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary". |
| cookielawinfo-checkbox-performance | 1 year | This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance". |
| PHPSESSID | session | This cookie is native to PHP applications. The cookie is used to store and identify a users' unique session ID for the purpose of managing user session on the website. The cookie is a session cookies and is deleted when all the browser windows are closed. |
| SERVERID | This cookie is used to assign the user to a specific server, thus to provide a improved and faster server time. It remembers which server had delivered the last page on to the browser. It also helps in load balancing. |
| Cookie | Durée | Description |
|---|---|---|
| currency | 1 hour | This cookie is used to store the currency preference of the user. |
| lang | This cookie is used to store the language preferences of a user to serve up content in that stored language the next time user visit the website. |
| Cookie | Durée | Description |
|---|---|---|
| YSC | session | This cookies is set by Youtube and is used to track the views of embedded videos. |
| __utma | 2 years | This cookie is set by Google Analytics and is used to distinguish users and sessions. The cookie is created when the JavaScript library executes and there are no existing __utma cookies. The cookie is updated every time data is sent to Google Analytics. |
| __utmb | 30 minutes | The cookie is set by Google Analytics. The cookie is used to determine new sessions/visits. The cookie is created when the JavaScript library executes and there are no existing __utma cookies. The cookie is updated every time data is sent to Google Analytics. |
| __utmc | session | The cookie is set by Google Analytics and is deleted when the user closes the browser. The cookie is not used by ga.js. The cookie is used to enable interoperability with urchin.js which is an older version of Google analytics and used in conjunction with the __utmb cookie to determine new sessions/visits. |
| __utmt | 10 minutes | The cookie is set by Google Analytics and is used to throttle request rate. |
| __utmz | 6 months | This cookie is set by Google analytics and is used to store the traffic source or campaign through which the visitor reached your site. |
| Cookie | Durée | Description |
|---|---|---|
| IDE | 1 year 24 days | Used by Google DoubleClick and stores information about how the user uses the website and any other advertisement before visiting the website. This is used to present users with ads that are relevant to them according to the user profile. |
| OAGEO | session | This cookie is set by the provider OpenX. This cookie is used for advertising campaigns on the website. The cookie helps in avoiding the same ad showing repeatedly. |
| OAID | 1 year | This cookie is set when an AdsWizz website visitor have opted out the collection of information by AdsWizz service or opted to disable the targeted ads by AdsWizz. |
| test_cookie | 15 minutes | This cookie is set by doubleclick.net. The purpose of the cookie is to determine if the user's browser supports cookies. |
| VISITOR_INFO1_LIVE | 5 months 27 days | This cookie is set by Youtube. Used to track the information of the embedded YouTube videos on a website. |
| Cookie | Durée | Description |
|---|---|---|
| CONSENT | 16 years 8 months 19 days 4 hours | No description |
| cookielawinfo-checkbox-functional | 1 year | The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". |
| cookielawinfo-checkbox-others | 1 year | No description |
| corpus | No description | |
| fb_sessiontraffic | 20 minutes | No description |
| pathway | 20 minutes | No description |
| SRV | No description | |
| TS011556a6 | No description | |
| visitor | 1 year | No description |
