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The Weekly Newsmagazine of Science
Volume 155, Number 19 (May 8, 1999)
|<<Back to Contents|
By J. Raloff
Canadian scientists have identified the likely culprit behind some historic, regional declines in Atlantic salmon. The researchers find that a near-ubiquitous water pollutant can render young, migrating fish unable ... |
Show kids that science and fun go hand in hand
The loveable characters from PBS’ award-winning The Magic School Bus™ will help children explore the scientific properties of polymers. Create goop, melt snow, extract polymers from milk, make snow erupt, and much more!
Self-contained, bus-shaped kit includes 20 experiment... |
Advanced Science, Simple Operation
Demonstrate the movement of invisible charged particles with this unique device. Designed in conjunction with the Contemporary Physics Education Project (CPEP), the Detector uses the analogy of magnetics. Students watch and plot the resulting paths of collisions between charged and ne... |
Scientists collect samples of the natural world to try to answer questions about our environment.
So many questions and so much we still don't know. The samples collected each represent a particular time and place in our environment. Think about your home. If a scientist had collected the plants and insects from your l... |
Symptoms of Spondylolysis and Spondylolisthesis
Spondylolysis and spondylolisthesis may not cause any obvious symptoms for some children. In others, spondylolysis can cause pain that spreads across the lower back. Pain may be worse when children arch their backs.
If the slipping is severe for children with spondylolist... |
internal reasoning: correlation != communication |
Densho: The Japanese American Legacy Project Programs
Densho Digital Archive
Free searchable database containing over 700 transcribed and indexed video oral histories and 10,700 photos and documents that trace Japanese American history from immigration to wartime detention to civil rights-era redress. Users include tea... |
internal reasoning: correlation != communication |
Austrian architect and urbanist
Wagner studied architecture at the School of Architecture at Vienna Academy, Austria, where he later became a teacher. Among his students were the renowned Art Nouveau architects Josef Maria Olbrich and Josef Hoffmann.
From 1895 he was influenced by new art styles, more suited to the nee... |
Gaia theory is a class of scientific models of the geo-biosphere in which life as a whole fosters and maintains suitable conditions for itself by helping to create an environment on Earth suitable for its continuity. The first such theory was created by the atmospheric scientist and chemist, Sir James Lovelock, who dev... |
No. 24; Updated March 2011
Click here to download and print a PDF version of this document.
Parents are usually the first to recognize that their child has a problem with emotions or behavior. Still, the decision to seek professional help can be difficult and painful for a parent. The first step is to gently try to tal... |
The American Revolutionary War began in 1775 and ended in 1783. The British ruled the American colonists and they had become increasingly rebellious. General Gage had ordered 700 British soldiers to Concord to destroy a weapon's depot belonging to the colonists. On the way, they are met by some rebellious colonists and... |
The Wild West
How the West Was Won
Dusty road shoot outs, roaming buffalo, bar brawls, gold, tragedy and genocide, damsels in distress, and cowboys riding off into the sunset—the taming of the Western frontier is one of the most colorful and fascinating periods of American history. In this beautifully illustrated and c... |
Previous abstract Next abstract
Session 40 - The Interstellar Medium.
Display session, Tuesday, June 09
Gamma Ray Burst (GRB) explosions can make kpc-size shells and holes in the interstellar media (ISM) of spiral galaxies if much of the energy heats the local gas to above 10^7 K. Disk blowout is probably the major cau... |
Question: How is bipolar disorder different from unipolar depression or 'regular' depression?
Answer: Both bipolar disorder and major depression are typically associated with depressive episodes. So both illnesses are accompanied by depressions. The difference is that in bipolar disorder people also have periods of ele... |
What is SMART ?SMART (Standardized Monitoring and Assessment of Relief and Transitions) is an inter-agency initiative launched in 2002 by a network of organizations and humanitarian practitioners.
SMART Methodology is an improved survey method for the assessment of severity of a humanitarian crisis based on the two mos... |
Making the Case for Action
This fact sheet(pdf) and slide deck provide essential state-specific information that addresses the economic imperative, the equity imperative, and the expectations imperative of the college- and career-ready agenda. These resources can be used on their own or serve as the foundation for a pe... |
Animals. Can’t live with ‘em, can’t live without eating ‘em. (Just kidding, vegans!)
Whether or not you do eat them, you certainly don’t want to waste any of the precious meat — and that’s what normally happens when a machine, not a human, tries to butcher an animal. After all, each animal is a different size and shape... |
internal reasoning: correlation != communication |
A land whose rich cultural heritage is discovered not only from within the walls of numerous museums, galleries and churches, many of which today, as zero category monuments are included in a part of the UNESCO World Heritage List, but also in that magical place on the Mediterranean, where even the shortest stroll beco... |
Smoke Detectors, Carbon Monoxide Detectors, Gas Detectors
SMOKE DETECTOR INFORMATION:
Most people are aware of the danger of fire but are unaware of the fatality of smoke. More people die from breathing smoke than by burns. In fact, deaths from smoke inhalation outnumber deaths by burning by 2:1. In a hostile fire, smo... |
Here is how it was done in 1810...By a mechanical wiz, not a beginner - now show us how you'd do it with a few motors and a controller
And I don't think that you'd put that old mechanical doll in the "simple" category?
Simple it was not. Just imagine what it took to program it by cutting brass cams for each degree of f... |
adopt many methods to determine whether the unborn baby is a boy or a
girl. The Chinese
pregnancy calendar is an often used
method to know about the
gender of the new life in the mothers womb.
is an ancient way for
predicting the gender of
the unborn baby
It is also known as a Chinese
conception chart, or
the Chinese C... |
internal reasoning: correlation != communication |
internal reasoning: correlation != communication |
Sign up to save your quiz points
or they’ll be gone
Prepare Your Classroom
to Learn with a Tablet.
Learning the musical alphabet notation and where each note is on the piano keyboard in relation to the two and three black keys.
Learning the musical alphabet A through G and finding them on the piano.
for Sophia online c... |
Average life span in the wild: 12 years
Size: 21 in (50 cm)
Weight: 14.4 oz (408 g)
Did you know? Chameleons don't change colors to match their surroundings. Each species displays distinct color patterns to indicate specific reactions or emotions.
The Meller's chameleon is the largest of the chameleons not native to Ma... |
Nuclear Energy in France
Nuclear energy is the cornerstone of french energy policy. In the ‘70s France chose to develop nuclear as its base load electricity source as a response to the oil crisis and assure its energy independence.
Nuclear Electricity Production: France currently counts 58 commercial nuclear reactors i... |
internal reasoning: correlation != communication |
Federal and state laws emphasize the importance of parents/guardians as key decision makers in the educational process. Child Study Team personnel share many common skills such as child advocacy, understanding of school functioning, knowledge and implementation of special education law, case management, transition plan... |
internal reasoning: correlation != communication |
internal reasoning: correlation != communication |
Mexican America - Introduction
"Mexican America" is a sampling of objects from the collections of the National Museum of American History. The stories behind these objects reflect the history of the Mexican presence in the United States. They illustrate a fundamentally American story about the centuries-old encounter b... |
internal reasoning: correlation != communication |
internal reasoning: correlation != communication |
LABDIEN [Hello]! My name is Hannah Rosenthal, and I am the Special Envoy to Monitor and Combat Anti-Semitism at the U.S. Department of State. In Latvian, envoy means “Īpašā sūtne”. Thank you for inviting me here today to speak to you about the importance of diversity and respect for others. I am always eager to speak t... |
internal reasoning: correlation != communication |
internal reasoning: correlation != communication |
Giant Water Scavenger Beetle
|Geographical Range||North America|
|Scientific Name||Hydrophilus triangularis|
|Conservation Status||Not listed by IUCN|
The name says it all. This large beetle lives in water, where it scavenges vegetation and insect parts. The insect can store a supply of air within its silvery belly, mu... |
- Action research (6 posts)
- Artist CPD (11 posts)
- Barriers to participation (2 posts)
- Change management (8 posts)
- Co-construction (3 posts)
- Community cohesion (12 posts)
- Creative curriculum development (13 posts)
- Creative teaching and learning (28 posts)
- Cross-curricular working (21 posts)
- Developing ... |
January 23, 2007:
The paper by researchers at Yale, the University of Winnipeg, Stony Brook University, and led by University of Florida paleontologist Jonathan Bloch reconstructs the base of the primate family tree by comparing skeletal and fossil specimens representing more than 85 modern and extinct species. The tea... |
White-throated Magpie-Jays (Calocitta formosa) are beautiful big jays that travel the North Pacific slopes in small flocks. Their songs and calls are quite varied - this is one of the typical calls, recorded on the road to Monteverde (Costa Rica).
Douglas Von Gausig (recordist; copyright holder), Naturesongs.com
This w... |
Crime and Personality: Personality Theory and Criminality Examined
Keywords: Criminality Personality Theory Criminal Personality Crime And Personality Criminology Psychopathy
The search for the criminal personality or super trait has captured both the minds and imaginations of academics and the wider community (Caspi e... |
internal reasoning: correlation != communication |
Octodon degus is generally considered endemic to west central Chile, where it inhabits the lower slopes of the Andes. Although some have argued that its range may extend north into Peru, this is not well supported. It is common in the international pet trade, however, and is often used in laboratory studies outside of ... |
Details of Glycemic Index (GI)
The GI Scale
The glycemic index uses a scale from 1 to 100, which indicates the rate at which 50 grams of carbohydrate in a particular food is absorbed into the bloodstream as blood-sugar. The main reference food (rated 100) is glucose.
GI Rating Categories
The glycemic index divides carb... |
They say anyone can follow a recipe. But even experienced cooks know things don't always work out. Often the problem lies in how the ingredients are measured - and what they're measured in.
Clear cups, with pour spouts, are primarily for liquids. They come in multiple-quart and 1-, 2-, and 4-cup sizes, with measurement... |
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2010 August 12
Explanation: Each August, as planet Earth swings through dust trailing along the orbit of periodic comet Swift-Tuttle, skygazers can ... |
internal reasoning: correlation != communication |
internal reasoning: correlation != communication |
internal reasoning: correlation != communication |
Posted by admin on August 21st, 2008
Maximum Transmission Unit (MTU) the size (in bytes) of the largest packet or frame that a given layer of a communications protocol can pass onwards. The MTU may be fixed by standards (as is the case with Ethernet) or decided at connect time. A higher MTU brings higher bandwidth effi... |
internal reasoning: correlation != communication |
This series enables children to use the computer for independent research into a range of curriculum related topics. They read the information from talking books and then link to writing grids so they can write about what they have read. High quality real speech gives added support on both the reading and writing activ... |
1. Why is extremism an issue in prisons?
Extremist groups often pose special security risks in prisons. They may encourage the overthrow of the government, and prison officials can be targeted as agents of "illegal" government authority. Further, their literature often encourages ethnic hatred, promoting a violent and ... |
internal reasoning: correlation != communication |
Wikipedia sobre física de partículas
Rapidinho. Me falaram que a definição de física de partículas da Wikipedia era muito ruim. E de fato, era assim:
Particle physics is a branch of physics that studies the elementary particle|elementary subatomic constituents of matter and radiation, and their interactions. The field ... |
internal reasoning: correlation != communication |
internal reasoning: correlation != communication |
The lushly forested nation of Guyana on Thursday joined a regional pact to protect jaguars, the elusive spotted cat that is the biggest land predator in the Americas, but is vulnerable due to expanded agriculture and mining that have carved away at their fragmented habitat.
Leaders of the government’s environment minis... |
The Online Teacher Resource
Receive free lesson plans, printables, and worksheets by email:
- Over 400 Pages
- Great Writing Habits.
- Character Sketches, Plot Summaries
- Excellent for students
Age Range: Kindergarten through Grade 2 (Early Elementary or Primary Level)
Overview and Purpose : In this activity, students... |
internal reasoning: correlation != communication |
- published: 19 Mar 2013
- views: 42
- author: T.A. B
possibly testing on weans, that worries me http://www.bbc.co.uk/news/world-us-canada-21849808.
A vaccine is a biological preparation that improves immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism,... |
This is a great activity that goes with the new book in the Sir Cumference series. The book is titled Sir Cumference and the Viking's Map. It is a story that correlates with coordinate graphing. The activity I made to go along with the book is a "map" graph and a set of ten sentences that have students mark an X at eac... |
Wars have given us the Jeep, the computer and even the microwave.
Will the war in Iraq give us the Tiger?
Military scientists at Edgewood Chemical Biological Center at Aberdeen Proving Ground hope so. The machine - its full name is the Tactical Garbage to Energy Refinery - combines a chute, an engine, chemical tanks an... |
internal reasoning: correlation != communication |
They are not expecting any angry birds, but bird-watchers are already seeing evidence of what is expected to be a major invasion of hungry birds winging through the region.
Normally content to hang out in the deep forests of Canada, grosbeaks, pine siskins, finches, redpolls and other seed-eaters are winging their way ... |
Then and now, there is ample proof that Americans do take Supreme Court nominations seriously. With good reason.
Sooner or later, the nation's most vexing disagreements over our most vital issues wind up before the Supreme Court. None quite penetrates to the core of our democratic being more than those involving First ... |
The vaunted protection that intellectually active adults get from Alzheimer’s disease has a dark downside, a study released Wednesday has found. Once dementia symptoms become evident and Alzheimer’s disease is diagnosed in such patients, their mental decline can come with frightening speed.
That finding, published in t... |
internal reasoning: correlation != communication |
Belgian physicist Francois Englert, left, speaks with British physicist… (Fabrice Coffrini / AFP/Getty…)
For physicists, it was a moment like landing on the moon or the discovery of DNA.
The focus was the Higgs boson, a subatomic particle that exists for a mere fraction of a second. Long theorized but never glimpsed, t... |
internal reasoning: correlation != communication |
Discrimination against citizens because of their sexual orientation or their youth is just as unfair as discrimination based on race, religion or gender. Access to housing, hotels, theaters and restaurants should be equal to all, as a matter of plain fairness.
The Palm Beach County Commission recognized this truth in p... |
Arnold Henry Guyot
||This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (June 2012)|
|Arnold Henry Guyot|
Arnold Henry Guyot
|Born||September 28, 1807
Boudevilliers, Canton of Neuchâtel, Switzerland
|Died||February 8, 1884
Pri... |
internal reasoning: correlation != communication |
"Helplessness" and "confusion" are words that easily come to mind when the issue of sick building syndrome is mentioned. It is a problem that does not have a regulatory solution, and is bound with engineering, medicine and emotions that will challenge the best of school administrators.
A careful management style and kn... |
internal reasoning: correlation != communication |
The giving of the law at Mount Sinai was the climax of a series of events that began at Passover, the moment and the means of the Israelites' redemption. At Passover they killed a lamb and put the blood on their doorposts. When the death angel passed through to slay the firstborn, those who had blood on the doorposts w... |
Ethiopian kids hack Zoom tablets in five months.
The One Laptop Per Child (OLPC) project recently tried a new approach to distributing computers to developing countries, by leaving boxes of tablets in remote Ethiopian villages with no instructions. The Motorola Zoom tablets had a custom English language OS, a solar cha... |
The Independent Jane
For all the love, romance and scandal in Jane Austen’s books, what they are really about is freedom and independence. Independence of thought and the freedom to choose.
Elizabeth’s refusal of Mr. Collins offer of marriage showed an independence seldom seen in heroines of the day. Her refusal of Mr.... |
This year, millions of New Year’s resolutions will be made – and then broken soon after. But there is one resolution that all men should keep: to maintain a healthy lifestyle.
Prostate cancer is the most common non-skin cancer in America, affecting one in six men, according to the Prostate Cancer Foundation. In additio... |
"GOT NOTHING BUT BLUE SKIES"
It is September 19,1783. The place, Lyons, France. Preparations are being made for a journey. A journey that will eventually take man from his secure environment of terra firma, and place him in a hostile environment called the atmosphere. The vehicle to be used is a hot air balloon. The br... |
Here to There: A History of Mapping
From the 16th to 18th centuries, many European mapmakers were convinced that California was an island — an Edenic paradise populated by black Amazons. The error persisted for over a hundred years after expeditions had proven that California was, in fact, firmly attached to the mainla... |
WAKING the GIANT Bill McGuire
While we transmit more than two million tweets a day and nearly one hundred trillion emails each year, we're also emitting record amounts of carbon dioxide (CO2). Bill McGuire, professor of geophysical and climate hazards at University College London, expects our continued rise in greenhou... |
Nursing a critically ill state back to health
|Indranill Basu Ray highlights the core problems that afflict Bengal's health sector and suggests a few ways to improve the situation|
Despite many technological and other achievements that have propelled India from being a developing nation to one of the top economies of t... |
From Wikipedia, the free encyclopedia
Preventive medicine or preventive care refers to measures taken to prevent diseases, (or injuries) rather than curing them or treating their symptoms. The term contrasts in method with curative and palliative medicine, and in scope with public health methods (which work at the leve... |
A “magic” herb, Carissa Edulis, that drew thousands of people to a remote Loliondo village in Tanzania was identified by Kenyan scientists a few years ago as a cure for a drug-resistant strain of a sexually transmitted disease, gonorrhoea. This herb also is believed to cure many other diseases besides gonorrhoea. The K... |
internal reasoning: correlation != communication |
Even though Facebook requires users to be at least 13 years old, there are 7.5. million users under that age, most of them not yet 10, according to projections from a "State of the Net" survey conducted by Consumer Reports.
The survey, published in the June issue of Consumer Reports, also found that the accounts of the... |
The Convention adjourned from July 26th to August 6th to allow the Committee of Detail – composed of John Rutledge of South Carolina, Edmund Randolph of Virginia, Nathaniel Gorham of Massachusetts, Oliver Ellsworth of Connecticut, and James Wilson of Pennsylvania – to prepare a rough draft of a constitution, based on t... |
internal reasoning: correlation != communication |
The concept of a numbering machine is quite simple. It consists of various wheels inside and all wheels are stamped with numbers. But, what could be done with this? Well, the wheels of a numbering machine can be set and arranged to form a date or various other numbers. Basically numbers machines are used to imprint ite... |
internal reasoning: correlation != communication |
SEA level rises and climate change are linked, say top scientists as they prepare the next major global climate change update.
More than 250 experts from 39 countries are in Hobart this week to review the latest draft of the Intergovernmental Panel on Climate Change's report including a new chapter on sea level.
The co... |
Polish second most spoken language
Polish is the second most common main language in England and Wales with more than half a million speakers, according to new figures from the 2011 Census.
Nearly one in 10 people in England and Wales - 8% - reported speaking a different main language to English or Welsh in the census,... |
Did You Know?
Facts, Figures & Folklore
About Fall / Autumn
Sept 18 : 04 days to Fall
Did you know that the word autumn comes from the French word, automne?
The word came into common usage around the 16th century, before which “harvest” was used to refer to this time of year. The use of harvest fell out of popularity a... |
THL Toolbox > Audio-Video > Overview
Contributor(s): David Germano, James Graves, Chelsea Hall, Eric Woelfel.
New developments in digital technology and the Web offer exciting new possibilities for the incorporation of audio-video into new areas of research, publication and teaching. They also allow us for the first ti... |
In 2006, two scientists announced that they had cooked an egg by placing it in between two cell phones. It has been thrououghly disproven and analyzed since the surface of the claim, but it is still an excellent opportunity to use the Scientific Thinking Principles on!
#1: Ruling Out Rival Hypotheses
This principle isn... |
Increased age, high blood cholesterol, high blood pressure and smoking are a few
of the risk factors related to heart disease, according to the American Heart Association.
You can modify, treat or control most risk factors to lower your risk by focusing
on your lifestyle habits or, if needed, taking medicine.
According... |
How To Win At Science Fairs (Dec, 1960)
How To Win At Science Fairs
by Ronald Benrey
YOU CAN WIN at a Science Fair as long as one thing interests you more than winning does. This is your project itself. It is going to be judged on scientific thought, creative ability, and presentation. You will really have to know the ... |
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