International weekly science journal, published by the American Association for the Advancement of Science (AAAS). »read more

Breaking science news and articles on global warming, extrasolar planets, stem cells, bird flu, autism, nanotechnology, dinosaurs, evolution -- the latest ... »read more

Nature - the world's best science and medicine on your desktop. »read more

Jan 22, 2010 ... Science Careers, a part of the journal Science and the American Association for the Advancement of Science, is the world's leading resource ... »read more

Jan 22, 2010 ... Science News: the bi-weekly news magazine of the Society for Science & the Public. »read more

The best way to understand where you need to be to get through the squalls, t-storms and cloudy conditions that threaten to ruin your day is to check out real time satellite images. »read more

ARX (Algorithmic Research) is a global provider of cost-efficient digital signature solutions for industries such as life sciences, healthcare, government, engineering, and energy. ARX’s CoSign digital signature solution automates approvals affordably in a compliant manner, allowing organizations to go paperless, expedite business processes and save costs. »read more

Hydroelectricity is produced from hydroelectric power plants or hydroelectric power stations. Hydroelectric power is a renewable source of energy produced in hydroelectric power plants. »read more

Oilgae is the world's leading information and intelligence resource for the algae fuels industry. Site provides news updates, blog, forum, an interactive club and a regular newsletter. Oilgae also publishes leading reports on algae fuels. »read more

Global magazine for industrial crane market. Latest news on bridge crane, jib crane, wire rope hoist, bridge crane end trucks, crane winches, lifting equipment and devices. »read more

Clean technology Business Review is a one stop resource for businesses focusing on developing environmentally sustainable energy, which use renewable and alternative sources to produce power. »read more

Tunnels & Tunnelling Journal covers all aspects of the underground construction sector and engineering companies involved. Builders,architects and construction companies can read news, reviews and features on tunnels and tunneling. »read more

Nanobiotechnews.com is ready to receive manuscripts on all aspects of scientific and technological advances in the fields of intersection of nanotechnology, molecular biology and biomedical sciences. It also dedicated to the field of nanotechnology and nanoscience with information on the latest developments in nanotubes, nanorobots force microscopes, biochemistry ,bioengineering, biofuels, molecular design, cell biology, nanomagnetism, nanomedicine, nanochemistry, nanoelectronic devices,.. »read more

SocialCMS.com is a free and open source content management software. It allows non-technical users to create and make changes to a website easily. It is developed on PHP/MySQL platform »read more

Energy Business Review provides latest energy industry news, analysis and market research reports.It also offers a comprehensive breakdown of energy producers, contractors and suppliers. »read more

Aquatic Informatics provides unique productivity software solutions for the rapidly growing water monitoring industry. »read more

Southern Electric are part of the well known Scottish & Southern Energy group. Southern Electric supply energy to many homes spread across the whole of England. You can get more information or get a quote online. »read more

Scottish Hydro Electric supply gas and electricy all over Scotland, at affordable prices and you can also get your account online. »read more

You are a software provider, application developer, or machine manufacturer: learn what our ACIS and CGM 3D modeling, CAD translation, HOOPS 3D visualization software components, and services can do for you. »read more

Diagenode offers a range of high quality ChIP-seq grade antibodies include Histone antibodies, H3K36me3, H3K4me3, H3K79me3, H3K9/14ac, H3K9ac, H3K9me3,Diagenode etc. »read more

Human ancestors walked comfortably upright 3.6 million years ago, new footprint study says

A comparison of ancient and contemporary footprints reveals that our ancestors were strolling much like we do some 3.6 million years ago, a time when they were still quite comfortable spending time in trees, according to a study which will be published in the March 22 issue of the journal PLoS ONE .

LHC surpasses its own record as the world's most powerful particle accelerator

The Large Hadron Collider , the so-called big bang machine outside Geneva, has eclipsed its own world record as the highest-energy particle accelerator in history. The collider, commonly known as the LHC, accelerated its twin proton beams to 3.5 trillion electron-volts, or TeV, Friday morning, according to a prepared statement from CERN , the European lab for particle physics that operates the LHC.

Nuclear Commission fines VA over botched prostate cancer radiation therapies

The U.S. Department of Veterans Affairs (VA) is being fined for botching 97 of 116 procedures to treat prostate cancer among men seeking care at the agency's medical center in Philadelphia. Although the punishment, which adds up to a mere $227,500, might not sound like more than a slap on the wrist, it is coming from the Nuclear Regulatory Commission (NRC) and is one of the largest the commission has ever given out for medical mistakes.

Are We Pushing the Earth's Environmental Tipping Points?

Jon Foley, director of the University of Minnesota's Institute on the Environment, talks with podcast host Steve Mirsky [ pictured left ] about his article in the April issue of Scientific American , "Boundaries for a Healthy Planet".

Is Earth past the tipping point?

Biodiversity loss. Land use. Freshwater use. Nitrogen and phosphorus cycles. Stratospheric ozone. Ocean acidification. Climate change. Chemical Pollution. Aerosol loading in the atmosphere.

A team of 30 scientists across the globe have determined that the nine environmental processes named above must remain within specific limits, otherwise the "safe operating space" within which humankind can exist on Earth will be threatened. Amid some controversy, the group has set numeric limits for seven of the nine so far (chemical pollution and aerosol loading are still being pinned down). And the researchers have determined that the world has already crossed the boundary in three cases: biodiversity loss, the nitrogen cycle and climate change.

Nitrogen cruise ends, mission to explore undersea volcanism begins

Editor's Note: Journalist and crew member Kathryn Eident is traveling on board the RV Atlantis on a monthlong voyage to sample and study nitrogen fixation in the eastern tropical Pacific Ocean, among other research projects. This is the seventh and final blog post detailing this voyage of discovery for ScientificAmerican.com . But the next leg of the cruise begins now: a deep water exploration of undersea volcanism.

Graphene used to make a hydrogen molecule "parking garage"

As automakers ramp up their plans to put greener vehicles on the road, hydrogen storage has become a pivotal issue. Whereas it's been suggested that graphene could play an important role in retaining hydrogen for use in fuel cells and other technologies, a team of researchers at the National Institute of Standards and Technology (NIST) and the University of Pennsylvania in Philadelphia say they've found a way to configure graphene that enables it to hold 100 times more hydrogen molecules than a single layer of the carbon-based substance.

The Ethical Dog

Every dog owner knows a pooch can learn the house rules--and when she breaks one, her subsequent groveling is usually ingratiating enough to ensure quick forgiveness. But few people have stopped to ask why dogs have such a keen sense of right and wrong. Chimpanzees and other nonhuman primates regularly make the news when researchers, logically looking to our closest relatives for traits similar to our own, uncover evidence of their instinct for fairness. But our work has suggested that wild canine societies may be even better analogues for early hominid groups--and when we study dogs, wolves and coyotes, we discover behaviors that hint at the roots of human morality.

Morality, as we define it in our book Wild Justice , is a suite of interrelated other-regarding behaviors that cultivate and regulate social interactions. These behaviors, including altruism, tolerance, forgiveness, reciprocity and fairness, are readily evident in the egalitarian way wolves and coyotes play with one another. Canids (animals in the dog family) follow a strict code of conduct when they play, which teaches pups the rules of social engagement that allow their societies to succeed. Play also builds trusting relationships among pack members, which enables divisions of labor, dominance hierarchies and cooperation in hunting, raising young, and defending food and territory. Because this social organization closely resembles that of early humans (as anthropologists and other experts believe it existed), studying canid play may offer a glimpse of the moral code that allowed our ancestral societies to grow and flourish.

MIND Reviews: The Shaking Woman

The Shaking Woman or a History of My Nerves by Siri Hustvedt.

Puberty: A Time for Less Learning

Ah, puberty. A time for raging hormones, growing independence and being stupid. Okay, not every teenager gets stupid. But they actually do learn less. And in a study published in the journal Science [see Hui Shen et al, http://bit.ly/dbeLY6 ], researchers describe the cellular and molecular changes that drive this puberty-associated desmartification.

Boundaries for a Healthy Planet (preview)

For nearly 10,000 years--since the dawn of civilization and the Holocene era--our world seemed unimaginably large. Vast frontiers of land and ocean offered infinite resources. Humans could pollute freely, and they could avoid any local repercussions simply by moving elsewhere. People built entire empires and economic systems on their ability to exploit what seemed to be inexhaustible riches, never realizing that the privilege would come to an end.

But thanks to advances in public health, the industrial revolution and later the green revolution, population has surged from about one billion in 1800 to nearly seven billion today. In the past 50 years alone, our numbers have more than doubled. Fueled by affluence, our use of resources has also reached staggering levels; in 50 years the global consumption of food and freshwater has more than tripled, and fossil-fuel use has risen fourfold. We now co-opt between one third and one half of all the photosynthesis on the planet.

Bugs off: Habitat loss killing Europe's butterflies, beetles and dragonflies

With fewer places left to breed and live, European butterflies, beetles, dragonflies and damselflies are dying in droves, according to the latest update to the IUCN Red List of Threatened Species .

The Science Talk Quiz: "Totally Bogus"

Hi, Steve Mirsky here, and this is the Scientific American Science Talk podcast’s quiz, TOTALLY BOGUS. Here are four science stories, but only three are true. See if you know which story is TOTALLY BOGUS.

Macro-Weirdness: "Quantum Microphone" Puts Naked-Eye Object in 2 Places at Once

PORTLAND, Ore.--What's the sound of one molecule clapping? Researchers have demonstrated a device that can pick up single quanta of mechanical vibration similar to those that shake molecules during chemical reactions, and have shown that the device itself, which is the width of a hair, acts as if it exists in two places at once--a "quantum weirdness" feat that so far had only been observed at the scale of molecules.

Which sperm will win the race to the egg: the green one or the red one?

Once they're inside the female reproductive organs, sperm pull out all the stops to outrace their rivals to the egg--especially if the opponent comes from another male. The process that determines which sperm wins, called "postcopulatory sexual selection," has been difficult to tease out, until now.

Transcription factors boost genetic differences to make individuals unique

The 23,000 protein-coding genes in the human genome can help determine whether a person will have blond hair or black, flat feet or arched. But that's hardly the whole story behind the millions of tiny differences among people. Most of the genome is so-called noncoding DNA , whose role in determining individual differences is only just starting to be understood.

Researchers create metal with a memory

Builders and engineers must often choose between materials that are strong and those that are flexible--rarely will they find a substance with both properties in abundance. Researchers are trying to change this through the development of "shape metal" alloys that are strong enough to resist high levels of strain while also being flexible enough to recover their original shape when a certain amount of heat is applied.

How Its Internal Clock Is Read, Knows Reindeer

Humans are pegged to a 24-hour cycle. We're locked into it not just by day and night--there’s the master timepiece in the brain called the circadian clock. But it doesn't make sense to live by a 24-hour clock in the Arctic, where it's dark or light for months at time. The solution? Lose the daily clock. Which is exactly what reindeer seem to have done, according to a study in Current Biology . [See Weiqun Lu et al, http://bit.ly/btOYTL ]

Reindeer don't sleep eight hours like we do, and there's no obvious 24-hour pattern to their lives. They just chomp on tundra, nap a few hours and feast again. But they still need to know when to mate, pack on fat or thicken their coats. So they probably rely on an annual clock instead, set by the hormone melatonin.

Breaking the Growth Habit (preview)

Editor’s introduction: Scientists have proposed compelling steps to ease specific kinds of environmental damage and slow consumption of certain resources [see “ Solutions to Environmental Threats ,”]. But Bill McKibben, scholar in residence at Middlebury College and co-founder of climate action group 350.org , maintains that to truly stop ruining the planet, society must break its most debilitating habit: growth.

In his new book, Eaarth: Making a Life on a Tough New Planet , McKibben argues that humankind, because of its actions, now lives on a fundamentally different world, which he calls “Eaarth.” This celestial body can no longer support the economic growth model that has driven society for 200 years. To avoid our own collapse, we must instead seek to maintain wealth and resources, in large part by shifting to more durable, localized economies.

Study: High Arctic's biodiversity down 26 percent since 1970

Mammals, birds and fish living in the High Arctic experienced an average 26 percent drop in their populations between 1970 and 2004 due to the loss of sea ice, according to a new report from The Arctic Species Trend Index, "Tracking Trends in Arctic Wildlife ."

The 2010 report, commissioned and coordinated by the Whitehorse, Yukon–based Circumpolar Biodiversity Monitoring Program (CBMP), was presented Wednesday at the State of the Arctic Conference in Miami. It covers 965 populations of 365 species, representing 35 percent of all known vertebrate species found in the Arctic.