Nombre total de pages vues
14/11/2025
SANTé/MEDECINE - CANCER - 12 AVANCEES REVOLUTIONNAIRES - 4. Une médecine de précision qui s’adapte à l’ADN du patient
13/11/2025
ASTRONOMY - Valles Marineris: The Grand Canyon of Mars
2024 November 10
Image Credit: NASA, USGS, Viking Project
Explanation: The largest canyon in the Solar System cuts a wide swath across the face of Mars. Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the Valles Marineris remains unknown, although a leading hypothesis holds that it started as a crack billions of years ago as the planet cooled. Several geologic processes have been identified in the canyon. The featured mosaic was created from over 100 images of Mars taken by Viking Orbiters in the 1970s.
10/11/2025
SANTé/MEDECINE - CANCER - 12 AVANCEES REVOLUTIONNAIRES - 3. Des vaccins personnalisés pour chaque patient
09/11/2025
08/11/2025
VULCANOLOGIE - Les volcans sous-marins : un danger bien caché
07/11/2025
SANTé/MéDECINE - CANCER - 12 AVANCéES REVOLUTIONNAIRES - 2. Un test sanguin capable de détecter 18 cancers dès le stade précoce
ASTRONOMY - Shell Galaxies in Pisces
2024 November 7
Image Credit & Copyright: George Williams
Explanation: This spectacular intergalactic skyscape features Arp 227, a curious system of galaxies from the 1966 Atlas of Peculiar Galaxies. Some 100 million light-years distant within the boundaries of the constellation Pisces, Arp 227 consists of the two galaxies prominent above and left of center, the shell galaxy NGC 474 and its blue, spiral-armed neighbor NGC 470. The readily apparent shells and star streams of NGC 474 are likely tidal features originating from the accretion of another smaller galaxy during close gravitational encounters that began over a billion years ago. The large galaxy on the bottom righthand side of the deep image, NGC 467, appears to be surrounded by faint shells and streams too, evidence of another merging galaxy system. Intriguing background galaxies are scattered around the field that also includes spiky foreground stars. Of course, those stars lie well within our own Milky Way Galaxy. The telescopic field of view spans 25 arc minutes or just under 1/2 degree on the sky.
05/11/2025
LES BELLES I?VENTIONS DE LEONARD DE VINCI - La vis d'Archimède et l'ingénierie hydraulique
SANTé/MéDECINE - CANCER - 12 AVANCéES REVOLUTIONNAIRES - 1. Une injection de 7 minutes qui remplace une heure de traitement
04/11/2025
NUCLEAIRE - Contamination - Indonésie : la situation est-elle vraiment sous contrôle ?
CRIIRAD
ASTRONOMY - Unicorn, Fox Fur and Christmas Tree
2025 December 25 Unicorn, Fox Fur and Christmas Tree Image Credit & Copyright : Michael Kalika Explanation: A star forming region ...
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2022 September 26 All the Water on Planet Earth Illustration Credit: Jack Cook, Adam Nieman, Woods Hole Oceanographic Institution ; Data ...
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2025 May 11 The Surface of Venus from Venera 14 Image Credit: Soviet Planetary Exploration Program , Venera 14 ; Processing & Copyri...

