Enn Original News
The Great Sunstone
November 2, 2011 05:18 PM - Andy Soos, ENN
The sunstone is a type of mineral attested in several 13th—14th century written sources in Iceland, one of which describes its use to locate the sun in a completely overcast sky. Sunstones are also mentioned in the inventories of several churches and one monastery in 14th—15th century Iceland. A theory exists that the sunstone had polarizing attributes and was used as a navigation instrument by seafarers in the Viking Age. To see if calcite is accurate enough for navigation, a team led by Guy Ropars, a physicist at the University of Rennes 1 in France, built a sunstone. They used a chunk of calcite from Iceland spar, a rock familiar to the Vikings, and locked it into a wooden device that beams light from the sky onto the crystal through a hole and projects the double image onto a surface for comparison. They then used it over the course of a completely overcast day. Their sunstone came within 1% of the true location of the sun even after it had dipped below the horizon.
Birds and the Great Pacific Garbage Patch
November 2, 2011 04:21 PM - Andy Soos, ENN
A swirling sea of plastic bags, bottles and other debris is growing in the North Pacific, and now another one has been found in the Atlantic. The Great Pacific Garbage Patch stretches for hundreds of miles across the North Pacific Ocean, forming a nebulous, floating junk yard on the high seas. It's the poster child for a worldwide problem: plastic that begins in human hands yet ends up in the ocean, often inside animals' stomachs or around their necks. Since 2009, photographer Chris Jordan has been documenting birds on Midway Atoll way out in the Pacific Ocean — near what is known as the Pacific Garbage Patch. What Jordan found on those islands were carcasses of baby birds that have died an unnerving death: According to the BBC, "about one-third of all albatross chicks die on Midway, many as the result of being mistakenly fed plastic by their parents."
Of Mice and Men
November 2, 2011 03:07 PM - Andy Soos, ENN
Mice are often used to test whether substances in food are harmful to humans. This requires that mice and humans metabolize substances in the same way. This may not be perfectly true (after all mice and men are different). The health risk associated with harmful substances in food may therefore be underestimated. Researchers at the Norwegian Institute of Public Health have adopted a mouse type where human enzymes have been inserted to examine whether people may be more sensitive to certain carcinogenic substances from heat-treated foods. They have obtained a better model to assess negative health effects in humans from substances in food using these mice.
Belgium to Completely Phase Out Nuclear Power by 2025
November 2, 2011 09:19 AM - David A Gabel, ENN
The small western-European country of Belgium currently has two commercial nuclear sites and a total of seven reactors. Nuclear energy accounts for over half of the nation's power consumption, a total of about 45 billion kilowatt-hours per year. Although typically quite fractured, Belgium's political parties have reached a consensus on nuclear power. The oldest reactors are to be shut down by 2015 and all nuclear reactors at both sites will be shut down by 2025. The plan is conditional on Belgium finding enough energy from alternative sources to prevent power shortages.
Interacting with Mars
November 1, 2011 05:42 PM - Andy Soos, ENN
First there were telescopes looking up at Mars. In time this became orbital views and then remote control robots wandering the surface. It would be nice to walk on Mars and really see what there is to see. Until then there is something called a CAVE, which is a 3D visualization center and it gives you a total immersive environment. This means that it renders virtual data in three dimensions and as you move your head and really see Mars as if you were there. So, when you are in that environment you can interact with the data on other planets in a more personal hands on or eyes on way.
November 1, 2011 03:27 PM - Andy Soos, ENN
Birds tend to be small creatures on average. SF State scientists, working with researchers from PRBO Conservation Science and the San Francisco Bay Bird Observatory who collected the data, found that birds' wings have grown longer and birds are increasing in mass over the last 27 to 40 years. What's making the birds bigger? The researchers think that the trend is due to climate change, but their findings put a twist in the usual thinking about climate change and body size. A well-known ecological rule, called Bergmann's Rule, states that animals tend to be larger at higher latitudes. One reason for this rule might be that larger animals conserve body heat better, allowing them to thrive in the generally colder climate of higher latitudes. The logic would then be that as the climate warms, birds should get smaller. Apparently this is not so.
E-Waste Dump in Africa Contaminating Community
November 1, 2011 01:30 PM - David A Gabel, ENN
Electronic waste, or "e-waste", is a major problem of the information age. As consumers continually upgrade their electronic devices, the old devices are discarded and usually end up in a toxic e-waste dump, usually located in a poor developing country. Such a dump is located in the capital city of the African country, Ghana. Toxic chemicals from the dump, known as the Agbogbloshie scrap metal site, have affecting the nearby community market, church headquarters, and school. Contaminants include lead, cadmium, and others, some at levels over 50 times higher than risk-free levels.
Northeast Weather Disaster Closes Schools and Postpones Halloween
October 31, 2011 03:01 PM - David A Gabel, ENN
The disaster that was this weekend's snow storm has wreaked havoc in the northeastern states of New Jersey, New York, and Connecticut. The damage was so widespread that it is being compared to the summer's big storm, Hurricane Irene. While the October storm doesn't get a name, it has left many people in the dark, just as the cold temperatures are settling in. Power outages and downed trees and wires throughout the area have caused many schools to be shut down. It has even caused the unthinkable in many towns: Halloween has been postponed.
The Undersides of Boats and Control of the Barnacles and Bacteria Growth
October 31, 2011 02:22 PM - Andy Soos, ENN
Opportunistic seaweed, barnacles, and bacterial films can quickly befoul almost any underwater surface, but researchers are now using advances in nanotechnology and materials science to design environmentally friendly underwater coatings that repel these biological stowaways. Biological build-up on the undersides of boats can increase drag, adding to fuel costs, and colonies of sea life can also disrupt the operation of ocean sensors and other underwater equipment. Anti-fouling paints, designed to kill the colonizers, often contain heavy metals or other toxic chemicals that might accumulate in the environment and unintentionally harm fish or other marine organisms. To replace toxic paints, scientists and engineers are now looking for ways to manipulate the physical properties of surface coatings to discourage biological colonization.
October 31, 2011 11:46 AM - Andy Soos, ENN
Can or do zombies exist? How can they and what are they? Zombie is a Haitian term used to denote an animated corpse brought back to life by mystical means such as witchcraft. It has evolved since then. The term is often figuratively applied to describe a hypnotized or infected person bereft of consciousness and self-awareness, yet ambulant and able to respond to surrounding stimuli. Since the late 19th century, zombies have acquired notable popularity, especially in North American and European folklore and urban legend. The living dead are a year-round affair these days, and not just in movies. Around the world, a growing number of people are dressing up as zombies for parties, festivals, walks and pub-crawls in every season. To explain the undying boom in all things zombie, experts point to the versatility of zombies as a metaphor.