How Do Telescopes Work Telescope Construction At Home

By John B Mayall

There are telescopes of several brands that are freely available in the market. However, even for one who wants to construct his telescope at home, there are several viable options.

One way to go about constructing a telescope is to buy each individual component and then assemble the whole structure. The required elements are mirrors, concave and convex lenses, the housing structure, brackets, and some other components. These can all be bought at local shops or in online stores. A comprehensive list of required elements can be downloaded from websites that serve as guides for amateurs looking to build their own telescopes. Books dedicated to this subject are available.

An enthusiast may also want to construct each element by hand at home, though that is an extremely time-consuming process and not the usual home method. It is a cumbersome process to create the housing compartment and arranging each element inside it. If one wants to follow this method, then one must be prepared to face several hurdles in the construction process.

[youtube]http://www.youtube.com/watch?v=X4bFyyCbAY0[/youtube]

Another method is to make use of telescope kits, which are available in the markets. These kits contain all the required elements and include instruction manuals to guide amateurs working at home. Using kit elements and assembling the instrument is considered a better method than constructing a telescope from individual elements bought separately. Telescope kits are cheaper and far less time-consuming than other methods of telescope construction. They save time spent on searching for each required component. Step-by-step instructions make it possible to work faster, making fewer mistakes along the way. These kits are intended for amateurs, and first-timers not yet experienced in making telescopes. A professional astronomer or one who aims to become a professional may however choose to work from scratch.

The point of consideration now is whether homemade telescopes are better than readymade instruments available otherwise. The simple answer to such a question is that both are almost the same with respect to quality. A homemade instrument displays the same characteristics as a readymade one of the same specification. A telescope made at home will have the same magnification factor, and is simpler to use in comparison to one bought in a shop. In fact, it is not complex at all and is similar to the ones built by early astronomers like Galileo.

The construction of telescopes at home, in truth, is often a joy, and a hobby that many enjoy. Several people consider it akin to an art, and have dedicated themselves to creating perfect instruments at home. Several sites online are a medium for proud astronomers to display their homemade telescopes. There are also web pages in existence that are dedicated guides for amateurs who want to create their own telescopes. Such pages give comprehensive lists of the elements required for its construction as well.

As with any other task, exhaustive research is required before setting out to make a telescope. It is imperative that the builder understands how each element performs individually and how it affects the whole. It also advisable to have storage space for the material required in construction of a telescope. However, despite all the effort that goes into construction of a homemade instrument, the results are reward enough.

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Wales widens smoking ban, includes at hospitals, schools and playgrounds
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Wales widens smoking ban, includes at hospitals, schools and playgrounds

Monday, March 1, 2021

Today, Wales extended the prohibition on smoking at hospitals, schools, and playgrounds, with violators to face a £100 fine. Wales is the first of the UK nations to introduce this ban.

This is in addition to various restrictions on the practice, including a ban on smoking in enclosed public spaces in place since 2007 and a ban on smoking in cars with children in place since 2015.

The Welsh government, governed by left-wing party Welsh Labour, said the measure was to discourage adults and children alike from smoking by making it appear less normal, and encourage the already partaking to quit.

Two hospitals in the country’s south have installed a button-activated speaker system to remind people hospitals are smoke-free. In 2016, a similar mechanism was tried at hospitals across Wales, where an announcement recorded by local school children would play upon pressing a button.

Minister for Mental Health, Wellbeing, and the Welsh Language Eluned Morgan said she was “immensely proud to have brought into force this law”, and “[t]his legislation will benefit the health of future generations in Wales, as fewer children will be exposed to smoking”. She concluded, “[w]e need to do everything we can to combat the harmful effects of smoking.”

The government was criticised by many smokers rights groups. Simon Clark, Director of the Freedom Organisation for the Right to Enjoy Smoking Tobacco compared the law to “taking a sledgehammer to crack a nut”, saying: “There is no evidence that smoking in the open air poses a risk to anyone else’s health, including children.” The director further explained, “Banning smoking on hospital grounds is particularly unjust because it targets smokers who may be stressed and in need of a comforting cigarette. Most smokers use their common sense and don’t smoke around small children. They don’t need politicians telling them how to behave.”

Wikinews contacted Eluned Morgan’s office to know more about this ban.

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BC man is selling the boat from old TV series Gilligan’s Island
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BC man is selling the boat from old TV series Gilligan’s Island

Tuesday, August 29, 2006

A man named George Schultz in Parksville, British Columbia is selling the boat from old TV series Gilligan’s Island at the cost of $99,000. The cruiser, originally cost about $290,000 in the 1960s.

“There have been a couple of modifications, so it doesn’t look exactly like the original,” said Shultz, a boat broker who’s selling the 36-foot Wheeler Express Cruiser for fellow Parksdale resident Scotty Taylor. “But it’s still the original boat.”

Originally, the boat’s name was The Blue Jacket.

“Just for the show, for a stage name, it was called the S.S. Minnow,” Shultz said. The name was a reference to Newton Minnow, once chairman of the FCC.

“He just liked the boat, he wanted to restore it, it was a nice looking boat, a wooden boat, a classic and he likes classic boats,” said Shultz. “The hole in the hull was actually the least of the repairs – the interior needed a lot more work”.

Someone later stole the plaque on the boat, but the 46-year-old boat still has the round life preserver with S.S. Minnow emblazoned on it and the skipper’s chair.

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Saturn moon Enceladus may have salty ocean
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Saturn moon Enceladus may have salty ocean

Thursday, June 23, 2011

NASA’s Cassini–Huygens spacecraft has discovered evidence for a large-scale saltwater reservoir beneath the icy crust of Saturn’s moon Enceladus. The data came from the spacecraft’s direct analysis of salt-rich ice grains close to the jets ejected from the moon. The study has been published in this week’s edition of the journal Nature.

Data from Cassini’s cosmic dust analyzer show the grains expelled from fissures, known as tiger stripes, are relatively small and usually low in salt far away from the moon. Closer to the moon’s surface, Cassini found that relatively large grains rich with sodium and potassium dominate the plumes. The salt-rich particles have an “ocean-like” composition and indicate that most, if not all, of the expelled ice and water vapor comes from the evaporation of liquid salt-water. When water freezes, the salt is squeezed out, leaving pure water ice behind.

Cassini’s ultraviolet imaging spectrograph also recently obtained complementary results that support the presence of a subsurface ocean. A team of Cassini researchers led by Candice Hansen of the Planetary Science Institute in Tucson, Arizona, measured gas shooting out of distinct jets originating in the moon’s south polar region at five to eight times the speed of sound, several times faster than previously measured. These observations of distinct jets, from a 2010 flyby, are consistent with results showing a difference in composition of ice grains close to the moon’s surface and those that made it out to the E ring, the outermost ring that gets its material primarily from Enceladean jets. If the plumes emanated from ice, they should have very little salt in them.

“There currently is no plausible way to produce a steady outflow of salt-rich grains from solid ice across all the tiger stripes other than salt water under Enceladus’s icy surface,” said Frank Postberg, a Cassini team scientist at the University of Heidelberg in Germany.

The data suggests a layer of water between the moon’s rocky core and its icy mantle, possibly as deep as about 50 miles (80 kilometers) beneath the surface. As this water washes against the rocks, it dissolves salt compounds and rises through fractures in the overlying ice to form reserves nearer the surface. If the outermost layer cracks open, the decrease in pressure from these reserves to space causes a plume to shoot out. Roughly 400 pounds (200 kilograms) of water vapor is lost every second in the plumes, with smaller amounts being lost as ice grains. The team calculates the water reserves must have large evaporating surfaces, or they would freeze easily and stop the plumes.

“We imagine that between the ice and the ice core there is an ocean of depth and this is somehow connected to the surface reservoir,” added Postberg.

The Cassini mission discovered Enceladus’ water-vapor and ice jets in 2005. In 2009, scientists working with the cosmic dust analyzer examined some sodium salts found in ice grains of Saturn’s E ring but the link to subsurface salt water was not definitive. The new paper analyzes three Enceladus flybys in 2008 and 2009 with the same instrument, focusing on the composition of freshly ejected plume grains. In 2008, Cassini discovered a high “density of volatile gases, water vapor, carbon dioxide and carbon monoxide, as well as organic materials, some 20 times denser than expected” in geysers erupting from the moon. The icy particles hit the detector target at speeds between 15,000 and 39,000 MPH (23,000 and 63,000 KPH), vaporizing instantly. Electrical fields inside the cosmic dust analyzer separated the various constituents of the impact cloud.

“Enceladus has got warmth, water and organic chemicals, some of the essential building blocks needed for life,” said Dennis Matson in 2008, Cassini project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California.

“This finding is a crucial new piece of evidence showing that environmental conditions favorable to the emergence of life can be sustained on icy bodies orbiting gas giant planets,” said Nicolas Altobelli, the European Space Agency’s project scientist for Cassini.

“If there is water in such an unexpected place, it leaves possibility for the rest of the universe,” said Postberg.

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What Is The Purpose Of Fashion Umbrellas?

byadmin

For much of the history of umbrellas, their usage was strictly to either keep you dry or prevent the sun from beating down on you. Nowadays, fashion umbrellas can be every bit as much a head-turning accessory as a designer watch, handbag, hat, or a pair of sunglasses. But they can also serve other purposes as well. Since you’ve decided to click here on our website, you have an interest in these types of products.

[youtube]http://www.youtube.com/watch?v=MpYd5ns5Ygc[/youtube]

It’s no secret that UV rays from the sun can be extremely harmful to you or your pets. But protecting yourself and your furry friends doesn’t have to look tacky. Because you did decide to click here, you have come to the best place on the Internet to purchase a high-quality umbrella. You can keep your dog in the shade with a fashion umbrella from RainTec Umbrellas. Whether you’re out for a walk, or they are on the leash while you’re on the patio, you will never have to worry about your pet being exposed to too much sunlight with the right kind of umbrella. Plus, Fido will look stylish in the process!

Fashion umbrellas are not confined to those on the runway or those among us who are the most chicest. You can stand out from the crowd with one of our well-made, sturdy umbrellas. Now that you’ve clicked here, you know that a trendy umbrella can spark a conversation almost anywhere you are. Whether you’re at the beach, or you’re using your umbrella at home, you can stay dry and keep cool with one of our products. Also, a chic fashion umbrella can be a great addition to your bridal shower, your photo shoot, or just about anything in between. When you’re ready to put your umbrella away, most of our products come with equally stylish cases as well.

We have a nearly endless number of customizable options from which to choose. You can pick the perfect combination of materials, prints, patterns, and so on. We manufacture fashion umbrellas every day. Select your own that is right for any outfit or occasion. Since you’ve already decided to click here, you can also pick from a design from one of our many reputable retailers if you are having trouble deciding what kind of options you’d like. When you’re ready to order, or if you have any questions, shoot us an email at any time, and we will be happy to assist you.

German BND claims U.S. exaggerated Iraq WMD claims
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German BND claims U.S. exaggerated Iraq WMD claims

Sunday, November 20, 2005

One of the most important arguments in the run-up to the Iraq war made by Colin Powell in his United Nations speech and President Bush in his State of the Union address was that Iraq had an active biological weapons program and possessed mobile biological weapons labs. According to an investigation by the Senate Intelligence Committee, the main source for this information was an Iraqi defector codenamed Curveball who was a source for the German central intelligence agency BND.

Several German intelligence officials responsible for Curveball have now told the LA Times that the Bush administration and the CIA have repeatedly exaggerated his claims and ignored warnings of the BND that the source was unreliable. Recounting his reaction after seeing Powell’s United Nations speech one German intelligence officer said: “We were shocked. Mein Gott! We had always told them it was not proven…. It was not hard intelligence.” This corroborates reporting by the German weekly newspaper Die Zeit from 2003 and 2004 based on statements of unnamed senior German intelligence officials.

Nine months earlier, in May 2002, a fabricator warning was posted in Curveball’s file in U.S. intelligence databases. Powell was never warned that his United Nations speech contained material that both the DIA and CIA had determined was false, even though several people present at Powell’s CIA meetings were fully aware of this.

At this time German intelligence officers would not let the CIA meet directly with Curveball, but allowed a CIA doctor to draw blood samples. Questioning the validity of Curveball’s information in front of his CIA supervisor, the doctor was advised to “Keep in mind that this war is going to happen regardless of what Curveball said or didn’t say and the Powers That Be probably aren’t terribly interested in whether Curveball knows what he’s talking about.”

Shortly after Powell’s UN speech and several days before the invasion, United Nations weapons inspectors attempted to directly verify several key claims made by Curveball, but concluded that they were unsustainable. The White House insisted on its WMD claims based on Curveball’s information.

Even after the invasion, when more and more of Curveball’s accounts were shown to be pure fabrication, the CIA and the Bush administration relied on Curveball’s information. When U.S. forces discovered trucks with lab equipment and Curveball claimed that these were identical to the ones he has been reporting about, the CIA rushed to publish a White Paper claiming that these trucks were part of Saddam Hussein’s secret biological weapons program and Bush claimed publicly that “We found the weapons of mass destruction.” Several days later, twelve of the thirteen WMD experts who analyzed the trucks agreed that the equipment was not suited for biological weapons production, with the only dissenting voice coming from the author of the original White Paper.

The White Paper remains posted on the CIA website to this date, and President Bush has not yet retracted his statement that Iraq produced “germ warfare agents” made in his State of the Union address or his postwar assertions that “we found the weapons of mass destruction.”

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3 Essentials To Decorating Small Spaces}

Submitted by: Tameka Norris

Decorating Small Spaces can be a tough job? Especially when you don’t know where to start. But let me give you some good news, there are several ways you can make the job a heck of a lot easier on yourself.

Besides finding multi-purpose furniture, there are 3 essential things you can do that will make all of the difference in decorating your small space.

Let’s talk about them now…

Step 1: The first thing you when you’re looking for space saving furniture is distinguish the difference between fantasy and reality. It will always be the case that some furniture will actually save you real space and other furniture will simply offer the illusion of space saved.

Beds are a good example of this. Compare a basic bed to a platform bed and you’ll notice that the platform bed doesn’t really save you much more (area) space than your basic bed. However, it is more affordable and less bulky in appearance, which is advantageous to a small room.

So, both types of furniture are essential. There will be many times that the need for actual space saved is vital and other times that you’ll just want to have a sleek piece of furniture that won’t drown out your small room.

[youtube]http://www.youtube.com/watch?v=nv4pkWnH1zY[/youtube]

Step 2: Always start from the top (ceiling) and work your way down to the bottom (floor). That’s right. When you consider a piece of furniture, always second guess your first choice. Don’t assume there isn’t better alternative out there. Start with the ceiling first.

TV stands are a good example of this. A lot of space can be saved in a small room by replacing a floor model version with a ceiling mounted version or wall mounted version. A TV mount is a wonderful alternative that can save you a lot of space.

Not to mention office systems. There are various types of wall mounted desks around. From all-in-one office systems to your basic wall mounted desk. You can even make your own wall mounted desk at an affordable price with a few boards, brackets and toggle bolts. All of which are available at your local hardware store.

Step 3: Match furniture size to wall size. Long walls tend to work very well with wide furniture and short walls tend to work very well with long furniture.

A bed is a good example of this. You can save yourself a lot of space by placing the head of a bed against the short wall and the side of it parallel to the long wall. It may not always be the best choice but the wonderful thing about this method is that it can always be adjusted according to your tastes. It’s there for you if and when you need it and if you don’t want to use it, you don’t have to. You can use it with just about every piece of furniture you want to arrange, so that you can consider all options available.

Decorating small spaces doesn’t have to be an extremely difficult job. There will be some work involved, but you can always make it as easy on yourself as possible by following those three essential steps.

Remember to first divide the space saving furniture you’re considering in two categories…

Furniture Category 1: Actual space saved.

Furniture Category 2: The illusion of space saved.

…and decide which one would be most advantageous to you with every piece of furniture that you’re considering.

Don’t assume the obvious is the only solution. Start at the top, with your ceiling. Move on to the middle, with your wall. And then, consider the floor modeled version furniture last. While doing so, keep in mind that just because an item might actually save you a lot of space, it doesn’t mean you should get it. Consider the pros and cons of each alternative and go with the choice that suits your home best (overall).

Lastly, arrange your furniture in the best way possible. Consider matching wide furniture to long walls and long furniture to short walls. This method will often help you save space in ways you might be overlooking.

And once you’ve worked your way through those 3 essential steps, you might find yourself surprised at how much space you saved in your small home and how much easier it was in the end.

About the Author: Tameka Norris offers space saving tips and small scale furniture recommendations for small rooms, homes, apartments, dorms, and small condos at her website

Furniture-for-Small-Spaces.com

.

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FBI begins widespread financial probe of 26 firms
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FBI begins widespread financial probe of 26 firms

Thursday, September 25, 2008

The FBI is investigating 26 firms and 1,400 individuals involved in the US financial crisis for fraud and “sub-prime lending practices”. Freddie Mac, Lehman Brothers, Fannie Mae and AIG are among the firms being scrutinized after recently receiving federal bailouts.

Investigators, who are cooperating with the IRS, Postal Office, and other federal offices to complete their investigation, are concerned that major corporations may have also forced or bribed ratings agencies to favor them.

The probe, which is in early stages, began eight months ago when the FBI began taking a close look at the mortgage industry and widespread irresponsible loaning practices. At least one corporation has been raided, but so far no evidence of fraud has been found.

The FBI has questioned executives of each of the firms closely, and arrested two in June. An anonymous source told The Times that the firms had been ordered to “hold all papers and e-mails under lock and key” as the FBI scours the finances of each firm.

Many of the companies and individuals being investigated are at the center of the nationwide financial crisis and controversial bailout plans, and have been widely blamed for the country’s financial crisis. The investigation has come at a time when the eyes of many in the US and around the world are turned towards the financial markets, as Congress and politicians scramble to fix the crisis while the election date looms closer.

Officials told CNN that it would be a long time before the investigations were finished, adding a warning: “Don’t expect indictments tomorrow or next week or next month”.

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Synagogues burn as Palestinians rejoice over Israeli withdrawal from Gaza Strip
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Synagogues burn as Palestinians rejoice over Israeli withdrawal from Gaza Strip

Monday, September 12, 2005

On Monday, the Israeli army withdrew from the Gaza Strip. Palestinians rejoiced over this occasion, with Mahmoud Abbas saying that “This is a day of happiness and joy that the Palestinian people have not witnessed for a century.”

The 38 years of Israeli presence in the Gaza strip have officially ended.

Palestinians were overjoyed at the sight of the burning synagogues, planting flags in the midst of it all, and shouting cries of independence. Teenagers set fire to a few synagogues, letting out anger at Israel’s occupation.

The fires did little damage to the concrete structures, but Abbas said that the Palestinians planned to destroy them fully.

Palestinian police admitted that there was not much they could or would do to stop this.

Last year, the Israeli cabinet had planned to destroy the synagogues, but this Sunday, under pressure from religious Jewish organizations, it reversed its decision. Palestinians were angry at the cabinet’s Sunday vote.

The synagogues, as well as all community structures, including community centers, schools, and sports facilites, are the only physical remnants of the Israeli Gaza Strip presence since all residential structures have been destroyed.

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Dairy cattle with names produce more milk, according to new study
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Dairy cattle with names produce more milk, according to new study

Thursday, January 29, 2009

Giving a cow a name and treating her as an individual with “more personal touch” can increase milk production, so says a scientific research published in the online “Anthrozoos,” which is described as a “multidisciplinary journal of the interactions of people and animals”.

The Newcastle University‘s School of Agriculture, Food and Rural Development’s (of the Newcastle University Faculty of Science, Agriculture and Engineering) researchers have found that farmers who named their dairy cattle Ermintrude, Daisy, La vache qui rit, Buttercup, Betsy, or Gertrude, improved their overall milk yield by almost 500 pints (284 liters) annually. It means therefore, an average-sized dairy farm’s production increases by an extra 6,800 gallons a year.

“Just as people respond better to the personal touch, cows also feel happier and more relaxed if they are given a bit more one-to-one attention,” said Dr Catherine Douglas, lead researcher of the university’s School of Agriculture, Food and Rural Development. “By placing more importance on the individual, such as calling a cow by her name or interacting with the animal more as it grows up, we can not only improve the animal’s welfare and her perception of humans, but also increase milk production,” she added.

Drs Douglas and Peter Rowlinson have submitted the paper’s conclusion: “What our study shows is what many good, caring farmers have long since believed. Our data suggests that, on the whole, UK dairy farmers regard their cows as intelligent beings capable of experiencing a range of emotions.” The scientific paper also finds that “if cows are slightly fearful of humans, they could produce [the hormone] cortisol, which suppresses milk production,” Douglas noted. “Farmers who have named their cows, probably have a better relationship with them. They’re less fearful, more relaxed and less stressed, so that could have an effect on milk yield,” she added.

South Norfolk goldtop-milk producer Su Mahon, one of the country’s top breeder of Jersey dairy herds, agreed with Newcastle’s findings. “We treat all our cows like one of the family and maybe that’s why we produce more milk,” said Mrs Mahon. “The Jersey has got a mind of its own and is very intelligent. We had a cow called Florence who opened all the gates and we had to get the welder to put catches on to stop her. One of our customers asked me the other day: ‘Do your cows really know their names?’ I said: I really haven’t a clue. We always call them by their names – Florence or whatever. But whether they really do, goodness knows,” she added.

The researchers’ comparative study of production from the country’s National Milk Records reveals that “dairy farmers who reported calling their cows by name got 2,105 gallons (7,938 liters) out of their cows, compared with 2,029 gallons (7,680 liters) per 10-month lactation cycle, and regardless of the farm size or how much the cows were fed. (Some 46 percent of the farmers named their cows.)”

The Newcastle University team which has interviewed 516 UK dairy farmers, has discovered that almost half – 48% – called the cows by name, thereby cutting stress levels and reported a higher milk yield, than the 54% that did not give their cattle names and treated as just one of a herd. The study also reveals cows were made more docile while being milked.

“We love our cows here at Eachwick, and every one of them has a name,” said Dennis Gibb, with his brother Richard who co-owns Eachwick Red House Farm outside of Newcastle. “Collectively, we refer to them as ‘our ladies,’ but we know every one of them and each one has her own personality. They aren’t just our livelihood, they’re part of the family,” Gibb explained.

“My brother-in-law Bobby milks the cows and nearly all of them have their own name, which is quite something when there are about 200 of them. He would be quite happy to talk about every one of them. I think this research is great but I am not at all surprised by it. When you are working with cows on a daily basis you do get to know them individually and give then names.” Jackie Maxwell noted. Jackie and her husband Neill jointly operate the award-winning Doddington Dairy at Wooler, Doddington, Northumberland, which makes organic ice cream and cheeses with milk from its own Friesian cows.

But Marcia Endres, a University of Minnesota associate professor of dairy science, has criticized the Newcastle finding. “Individual care is important and could make a difference in health and productivity. But I would not necessarily say that just giving cows a name would be a foolproof indicator of better care,” she noted. According to a 2007 The Scientist article, named or otherwise, dairy cattle make six times more milk today than they did in the 1990s. “One reason is growth hormone that many U.S. farmers now inject their cows with to increase their milk output; another is milking practices that extend farther into cows’ pregnancies, according to the article; selective breeding also makes for lots of lactation,” it states.

Critics claimed the research was flawed and confused a correlation with causation. “Basically they asked farmers how to get more milk and whatever half the farmers said was the conclusion,” said Hank Campbell, author of Scientific Blogging. In 1996, the Department for Environment, Food and Rural Affairs provided for a complex new cattle passport system where farmers were issued with passport identities. The first calf born under the new regime were given names like “UK121216100001.”

Dr Douglas, however, counters that England doesn’t permit dairy cattle to be injected hormones. The European Union and Canada have banned recombinant bovine growth hormone (rGBH), which increases mastitis infection, requiring antibiotics treatment of infected animals. According to the Center for Food Safety, rGBH-treated cows also have higher levels of the hormone insulin-like growth factor 1 (IGF1), which may be associated with cancer.

In August 2008, Live Science published a study which revealed that cows have strange sixth sense of magnetic direction and are not as prone to cow-tipping. It cited a study of Google Earth satellite images which shows that “herds of cattle tend to face in the north-south direction of Earth’s magnetic lines while grazing or resting.”

Newcastle University is a research intensive university in Newcastle upon Tyne in the north-east of England. It was established as a School of Medicine and Surgery in 1834 and became the “University of Newcastle upon Tyne” by an Act of Parliament in August 1963.

The School of Agriculture, Food and Rural Development is a school of the Newcastle University Faculty of Science, Agriculture and Engineering, a faculty of Newcastle University. It was established in the city of Newcastle upon Tyne as the College of Physical Science in 1871 for the teaching of physical sciences, and was part of Durham University. It existed until 1937 when it joined the College of Medicine to form King’s College, Durham.

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