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Get flash to fully experience Pearltrees
Géographie
Secouchermoinsbete.fr : le site qui permet de briller en soirée
Le Titanic était le second navire d'une série de 3 paquebots commandés par la White Star Line. Il y eut donc également l'Olympic et le Britannic : si le premier a connu une longue carrière malgré de nombreuses collisions (il éventra même un sous-marin allemand !), le Britannic a connu le même sort que son grand frère : il coula durant la Première Guerre mondiale 2 ans après sa mise en service. Voir la fiche Le syndrome de Marie-Antoinette est un phénomène rare qui, en quelques heures et souvent à la suite d'un stress intense, blanchit d'un coup la chevelure. Il ne touche que les personnes ayant des cheveux poivre et sel, car il s'agit d'une chute brutale des cheveux pigmentés, qui ne laisse subsister que les cheveux blancs.
Cultural Tour
Geo Maps & Stats
A wonderfully smooth, rich indulgence, butter has sustained lives, cultures, and civilizations for millennia. Explore butter’s history, how it’s made, and glean a cooking tip or two.
Webexhibits
Neuroscience For Kids
The smell of a flower - The memory of a walk in the park - The pain of stepping on a nail. These experiences are made possible by the 3 pounds of tissue in our heads...the BRAIN!! Discover the exciting world of the brain, spinal cord, neurons and the senses. Use the experiments, activities and games to help you learn about the nervous system. There are plenty of links to other web sites for you to explore. Can't find what you are looking for?Connaissances et savoirs en accès libre
Philo
3 That which does not have any mass, does not exist in a physical sense. No particle is without mass, it either exists and contains mass, or contains no mass and therefore does not exist. 10 A true sphere cannot exhibit a wave pattern, nor show precession, nor possess any other physical abnormalities, either on the interior or the exterior. 13 Time cannot be affected by measurements from devices, nor by observer positions either at rest or not, nor by any event, nor mass, nor any other consideration such as light. 16 There is a determinable sequencing of event horizons for any chosen coordination point, once the initial establishment of absolute sequence has been determined. Physical Constants
17 postulates related to Physics
Physics Simulations and Artwork
Here is a 3D view of a hydrogren atom in the 4f state. The left image was made in C++ using a technique described by Krzysztof Marczak to make it volumetric like a cloud of smoke. The right image was made in Mathematica by adding 2D cross-sectional layers. The animations were made in POV-Ray using DF3 density files .
The 13 Most Important Numbers in the Universe - James D. Stein's Cosmic Numbers
In the 17th century, scientists understood three phases of matter—solids, liquids and gases (the discovery of plasma, the fourth phase of matter, lay centuries in the future). Back then, solids and liquids were much harder to work with than gases because changes in solids and liquids were difficult to measure with the equipment of the time. So many experimentalists played around with gases to try to deduce fundamental physical laws. Robert Boyle was perhaps the first great experimentalist, and was responsible for what we now consider to be the essence of experimentation: vary one or more parameter, and see how other parameters change in response. It may seem obvious in retrospect, but hindsight, as the physicist Leo Szilard once remarked, is notably more accurate than foresight.
Over the years, we've been blessed with innumerable breathtaking images from the pursuit of science - from the unimaginably huge Pillars of Creation to the endlessly tiny Mandelbrot Fractals . But some of these images have taken on an iconic status, instantly recognisable to schoolchildren and Republican presidential candidates alike. The problem is, a lot of these iconic science images are more icon than science.
Five iconic science images, and why they're wrong : SciencePunk
42explore: Thematic Pathfinders for All Ages
Why start with a search engine, when you can find a pathfinder to fit your needs at 42eXplore? When learning something new, it's nice to have more than one resource to explore. This web project provides "four to eXplore" for each topic. On each page you'll find definitions, activities, the 4 good starting points, and many more links and resources for the thematic topic.
The Library of Congress >> Researchers >> Science Reference Services Top of Page Biology (QH) & Human Anatomy (QM) - Life sciences Geography, Anthropology, Recreation (G) - Maps, people, & leisure Motor Vehicles, Aeronautics, Astronautics (TL) - Vehicular travel & technology
Browse Archived Questions and Answers (Everyday Mysteries: Fun Science Facts from the Library of Congress)
"I don't know what your destiny will be, but one thing I know: the only ones among you who will be really happy are those who will have sought and found how to serve." - Albert Schweitzer. Annette Lamb and Larry Johnson are educators and professional developers. We provide this page as a free service. This website contains no outside sponsorship.