Bad Astronomy - Slate A new paper just published in the prestigious Astrophysical Journal makes a stunning claim: There are 10 times as many galaxies in the Universe as we previously thought. At least. The total number comes in at about 2 trillion of them. Now, let me be clear. This doesn’t meant the Universe is 10 times bigger than we thought, or there are 10 times as many stars. I’ll explain—I mean, duh, it’s what I do—but to cut to the chase, what they found is that there are lots of teeny, faint galaxies very far away that have gone undetected. What the astronomers did was look at extremely deep images of the Universe taken in surveys, for example the Hubble Ultra Deep Field. That’s a lot of galaxies. Surveys like the UDF are limited. The astronomers who did this research had an interesting problem. The answer is two-fold. Those numbers change with distance. At the same time, these faint galaxies are easier to see close to us, and harder farther away. NASA,ESA, H. As the authors themselves say:
List of experiments From Wikipedia, the free encyclopedia The following is a list of historically important scientific experiments and observations demonstrating something of great scientific interest, typically in an elegant or clever manner. Astronomy[edit] Biology[edit] Chemistry[edit] Economics and political science[edit] Geology[edit] Charles Mason conducts an experiment near the Scottish mountain of Schiehallion that attempts to measure the mean density of the Earth for the first time. Physics[edit] Psychology[edit] See also[edit] Science portal
Atomic Rockets Your imagination has been captured by the roaring rockets from Heinlein's SPACE CADET or the Polaris from TOM CORBETT, SPACE CADET. But are such rockets possible? How does one go about defining the performance of these atomic-powered cruisers? This document gives some hints and equations that will allow back-of-the-envelope calculations on such matters. Though horribly simplistic, they are far better than just making up your figures. This site was mainly intended for science fiction authors who wanted a little scientific accuracy so they can write SF "the way God and Heinlein intended" (Arlan Andrews's Law). The engine and the torchship pages explain how easily do some of the calculations using Nomograms. . While this site originally focused on rocketry equations, as you can see it has grown to encompass other topics of interest to SF authors and game designers.
www.j-bradford-delong.net/Econ_Articles/Reviews/diamond_guns.html This will start as a a normal sparring-match with Ricardo Duchesne (Mary 4) and then will be going to branch off into something perhaps far more interesting: >It is clear from my post >that I was using the term 'backwardness' within the context of WS >theory, which is not about the medieval world. Diamond draws a >rough line across the African continent to distinguish "white" Africa >from "black" Africa proper. This dividing line still ignores Ethiopia - is it black, colored - what is it? Now, if Ricardo and Jim and I for once agree that in the pre-1500 period Africa was not markedly more `backward' than Europe and that thereafter `Africa' began to drop behind Europe not because of European colonialism (arms-sales, the slave-trade, plunder of African maritime trade, what have you) but because its agriculture could not keep up with European agriculture, therefore allowing for lesser trade, therefore allowing for less urban development etc. we have a major problem.
Pharyngula Probably not. But the New York Times reports: A review of studies has found that the health benefits of infant male circumcision vastly outweigh the risks involved in the procedure. Actually, it doesn’t. Not at all. The paper is all about the frequency of circumcision in the US; this is the only real data in the paper, and notice that a good chunk of it is speculation. Prevalence of adult circumcision in the United States during the past 6 decades (1948-2010). It does toss in a table purporting to show the tremendous risks of not circumcising baby boys, but this is not new — these are the same sloppy data that the author has been peddling for over a decade. The author is Brian Morris, better known as the Man Who Hates Foreskins. Take that first condition, the likelihood of urinary tract infections. Or look at his claim of much greater rates of HIV infection. Armed with this hunch, rather than set up a website I chose to do some research. It’s also an argument that can cut both ways.
chemsoc timeline - flash We would like to invite you to suggest other items for inclusion in the chemsoc timeline. All genuine suggestions will be considered and those accepted will be credited to the individual responsible! The events do not have to be chemistry related - just notable discoveries or incidences that are of interest to scientists and the general public. Please Email timeline@chemsoc.org with your suggestion, where possible please include the date the event/discovery took place and some basic details: where it took place, who was involved and maybe some other sources of information. You can even make predictions for inventions or discoveries that you think will be made in years to come. For example if you think teleportation will be possible in 2020, why not suggest it to us! chemsoc's timeline artist Murray Robertson will create an an appropriate image to represent each successful entry. back to top
Geeks are Sexy Technology News | tech, science, news and social issues for geeks The Discovery of Argon Carmen J. Giunta, Department of Chemistry, Le Moyne College, Syracuse, NY 13214 Presented at the 211th ACS National Meeting, New Orleans, LA, March 24, 1996. Copyright © 1996 Abstract The history of science is full of stories which exhibit scientific methodology to an exemplary degree. Introduction and Outline Good morning. Pedagogical Background: Le Moyne College CHM 203, "Scientific Thought" Le Moyne College is a small, undergraduate-oriented institution with a Core curriculum founded on the liberal arts. The goal of the class is to teach non-science majors how scientists thin--and also some content if I'm lucky! Scripture says there is no new thing under the sun, and that is certainly true of the idea of using case histories to teach scientific method. Historical Background: The Discovery of Argon Morals of the Story: Lessons Learned from the Discovery of Argon In this section I list a few of object lessons which can be garnered from detailed study of the discovery of argon.[6] Notes
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