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Thursday, December 18, 2008

A team of eight transplant surgeons in Cleveland Clinic in Ohio, USA, led by reconstructive surgeon Dr. Maria Siemionow, age 58, have successfully performed the first almost total face transplant in the US, and the fourth globally, on a woman so horribly disfigured due to trauma, that cost her an eye. Two weeks ago Dr. Siemionow, in a 23-hour marathon surgery, replaced 80 percent of her face, by transplanting or grafting bone, nerve, blood vessels, muscles and skin harvested from a female donor’s cadaver.

The Clinic surgeons, in Wednesday’s news conference, described the details of the transplant but upon request, the team did not publish her name, age and cause of injury nor the donor’s identity. The patient’s family desired the reason for her transplant to remain confidential. The Los Angeles Times reported that the patient “had no upper jaw, nose, cheeks or lower eyelids and was unable to eat, talk, smile, smell or breathe on her own.” The clinic’s dermatology and plastic surgery chair, Francis Papay, described the nine hours phase of the procedure: “We transferred the skin, all the facial muscles in the upper face and mid-face, the upper lip, all of the nose, most of the sinuses around the nose, the upper jaw including the teeth, the facial nerve.” Thereafter, another team spent three hours sewing the woman’s blood vessels to that of the donor’s face to restore blood circulation, making the graft a success.

The New York Times reported that “three partial face transplants have been performed since 2005, two in France and one in China, all using facial tissue from a dead donor with permission from their families.” “Only the forehead, upper eyelids, lower lip, lower teeth and jaw are hers, the rest of her face comes from a cadaver; she could not eat on her own or breathe without a hole in her windpipe. About 77 square inches of tissue were transplanted from the donor,” it further described the details of the medical marvel. The patient, however, must take lifetime immunosuppressive drugs, also called antirejection drugs, which do not guarantee success. The transplant team said that in case of failure, it would replace the part with a skin graft taken from her own body.

Dr. Bohdan Pomahac, a Brigham and Women’s Hospital surgeon praised the recent medical development. “There are patients who can benefit tremendously from this. It’s great that it happened,” he said.

Leading bioethicist Arthur Caplan of the University of Pennsylvania withheld judgment on the Cleveland transplant amid grave concerns on the post-operation results. “The biggest ethical problem is dealing with failure — if your face rejects. It would be a living hell. If your face is falling off and you can’t eat and you can’t breathe and you’re suffering in a terrible manner that can’t be reversed, you need to put on the table assistance in dying. There are patients who can benefit tremendously from this. It’s great that it happened,” he said.

Dr Alex Clarke, of the Royal Free Hospital had praised the Clinic for its contribution to medicine. “It is a real step forward for people who have severe disfigurement and this operation has been done by a team who have really prepared and worked towards this for a number of years. These transplants have proven that the technical difficulties can be overcome and psychologically the patients are doing well. They have all have reacted positively and have begun to do things they were not able to before. All the things people thought were barriers to this kind of operations have been overcome,” she said.

The first partial face transplant surgery on a living human was performed on Isabelle Dinoire on November 27 2005, when she was 38, by Professor Bernard Devauchelle, assisted by Professor Jean-Michel Dubernard in Amiens, France. Her Labrador dog mauled her in May 2005. A triangle of face tissue including the nose and mouth was taken from a brain-dead female donor and grafted onto the patient. Scientists elsewhere have performed scalp and ear transplants. However, the claim is the first for a mouth and nose transplant. Experts say the mouth and nose are the most difficult parts of the face to transplant.

In 2004, the same Cleveland Clinic, became the first institution to approve this surgery and test it on cadavers. In October 2006, surgeon Peter Butler at London‘s Royal Free Hospital in the UK was given permission by the NHS ethics board to carry out a full face transplant. His team will select four adult patients (children cannot be selected due to concerns over consent), with operations being carried out at six month intervals. In March 2008, the treatment of 30-year-old neurofibromatosis victim Pascal Coler of France ended after having received what his doctors call the worlds first successful full face transplant.

Ethical concerns, psychological impact, problems relating to immunosuppression and consequences of technical failure have prevented teams from performing face transplant operations in the past, even though it has been technically possible to carry out such procedures for years.

Mr Iain Hutchison, of Barts and the London Hospital, warned of several problems with face transplants, such as blood vessels in the donated tissue clotting and immunosuppressants failing or increasing the patient’s risk of cancer. He also pointed out ethical issues with the fact that the procedure requires a “beating heart donor”. The transplant is carried out while the donor is brain dead, but still alive by use of a ventilator.

According to Stephen Wigmore, chair of British Transplantation Society’s ethics committee, it is unknown to what extent facial expressions will function in the long term. He said that it is not certain whether a patient could be left worse off in the case of a face transplant failing.

Mr Michael Earley, a member of the Royal College of Surgeon‘s facial transplantation working party, commented that if successful, the transplant would be “a major breakthrough in facial reconstruction” and “a major step forward for the facially disfigured.”

In Wednesday’s conference, Siemionow said “we know that there are so many patients there in their homes where they are hiding from society because they are afraid to walk to the grocery stores, they are afraid to go the the street.” “Our patient was called names and was humiliated. We very much hope that for this very special group of patients there is a hope that someday they will be able to go comfortably from their houses and enjoy the things we take for granted,” she added.

In response to the medical breakthrough, a British medical group led by Royal Free Hospital’s lead surgeon Dr Peter Butler, said they will finish the world’s first full face transplant within a year. “We hope to make an announcement about a full-face operation in the next 12 months. This latest operation shows how facial transplantation can help a particular group of the most severely facially injured people. These are people who would otherwise live a terrible twilight life, shut away from public gaze,” he said.

Sunday, September 15, 2019

Yesterday, oil facilities belonging to Saudi Arabia’s state-owned Saudi Aramco were hit by multiple drone strikes in a pre-dawn raid. The attacks triggered major fires at a processing plant and an oil field, which state media said were under control. The Yemen-based Houthi movement claimed responsibility for the attacks.

According to the Saudi Press Agency, the attacks occurred at 4:00 A.M. local time (0100 UTC) and struck the largest processing plant at Abqaiq and the Khurais oil field. The oil field is about 160 km (100 miles) east of the capital, Riyadh. The agency did not mention if there were casualties, but said exports were continuing.

Reuters, citing anonymous sources, reported both production and export of oil had been disrupted. Saudi officials subsequently said 5.7 million barrels of per-day production had been disrupted. This would be nearly half of Saudi Arabia’s entire production and around five percent on a global basis.

Speaking on al-Masirah TV in Yemen, Houthi military spokesperson Yahya Sarea said it had carried out the attack using ten drones. According to him, it was among the largest Houthi operations inside of Saudi Arabia and was accomplished with the help of “honourable people inside the kingdom”.

“These attacks are our right, and we warn the Saudis that our targets will keep expanding”, Saree said. “We have the right to strike back in retaliation to the air strikes and the targeting of our civilians for the last five years.”

US Secretary of State Mike Pompeo posted a message on Twitter blaming Iran for the attacks, saying there was “no evidence the attacks came from Yemen.” BBC’s Jonathan Marcus said questions remain how much direct Iranian assistance is received by the Houthis who are ideologically aligned with Iran.

In 2015, Saudi Arabia started supporting the government of Abdrabbuh Mansur Hadi against the Houthi rebellion, providing airstrikes with the Royal Saudi Air Force. The United Nations called the resulting humanitarian crisis the worst in the world.

In 2006, Abqaiq was the target of an Al-Qaeda suicide attack.

Wednesday, June 20, 2007

A study published on June 18 in the American Proceedings of the National Academy of Sciences has found a link between the consumption of foie gras and other meat products and a number of diseases, including Alzheimer’s disease, rheumatoid arthritis, diabetes mellitus type 2, tuberculosis, and amyloidosis. The link exists in genetically susceptible individuals.

The study was lead by Alan Solomon, M.D., a professor and researcher at the University of Tennessee Graduate School of Medicine and the director of the Human Immunology and Cancer / Alzheimer’s Disease and Amyloid-Related Disorders Research Program. Amyloidoses are a group of disease states caused by the deposition in vital organs of proteins in the form of fibrils, causing a range of symptoms such as swelling and kidney damage. The deposition of amyloid beta in the brain is central in the origin of the disease process of Alzheimer’s disease. Foie gras is made from the livers of ducks or geese that have been force-fed.

According to Solomon, “we posit that this and perhaps other forms of amyloidosis may be transmissible, akin to the infectious nature of prion-related illnesses [such as mad cow disease]. In addition to foie gras, meat derived from sheep and seemingly healthy cattle may represent other dietary sources of [the fibrils]. People with a family history of Alzheimer’s disease, diabetes, rheumatoid arthritis or other amyloid-associated diseases should avoid consuming foie gras and other foods that may be contaminated with fibrils,” continued Solomon.

Monday, May 14, 2007

Buffalo, New York —A massive warehouse complex of at least 5 buildings caught on fire in Buffalo, New York on 111 Tonawanda Street, sending a plume of thick, jet black colored smoke into the air that could be seen as far away as 40 miles.

As of 6:40 a.m., the fire was under control, and firefighters were attempting to stop it from spreading, but could not get to the center of the fire because of severe amounts of debris. Later in the morning, the fire was extinguished.

“The fire is mostly under debris at this point. It’s under control, but it’s under some debris. We really can’t get to it. We’re just going to have to keep on pouring water on it so it doesn’t spread,” said Thomas Ashe, the fire chief for the North Buffalo based fire division who also added that at one point, at least 125 firefighters were on the scene battling the blaze. One suffered minor injures and was able to take himself to the hospital to seek medical attention.

Shortly after 8:00 p.m. as many as 3 explosions rocked the warehouse sending large mushroom clouds of thick black smoke into the air. After the third explosion, heat could be felt more than 100 feet away. The fire started in the front, one story building then quickly spread to three others, but fire fighters managed to stop the flames from spreading onto the 3 story building all the way at the back.

According to a Buffalo Police officer, who wished not to be named, the fire began at about 7:00 p.m. [Eastern time], starting as a one alarm fire. By 8:00 p.m., three fire companies were on the scene battling the blaze. Police also say that a smaller fire was reported in the same building on Saturday night, which caused little damage.

At the start of the fire, traffic was backed up nearly 4 miles on the 198 expressway going west toward the 190 Interstate and police had to shut down the Tonawanda street exit because the road is too close to the fire.

At one point, traffic on the 198 was moving so slow, at least a dozen people were seen getting out of their cars and walking down the expressway to watch the fire. That prompted as many as 10 police cars to be dispatched to the scene to force individuals back into their cars and close off one of the 2 lanes on the westbound side.

One woman, who wished not to be named as she is close to the owner of the warehouse, said the building is filled with “classic cars, forklifts, and money” and that owner “does not have insurance” coverage on the property. The building is not considered abandoned, but firefighters said that it is vacant.

Officials in Fort Erie, Ontario were also swamped with calls to fire departments when the wind blew the smoke over the Niagra River and into Canada.

It is not known what caused the fire, but a car is suspected to have caught on fire and there are reports from police and hazmat crews, that there were also large barrels of diesel fuel being stored in one building. Firefighters say the cause of the blaze is being treated as “suspicious.” The ATF is investigating the fire and will bring dogs in to search the debris.

Monday, December 2, 2013

Police in the West Midlands in England today said nearly 200 kilograms worth of drugs with value possibly as great as £30 million (about US$49 million or €36 million) has been seized from a unit in the town of Brownhills. In what an officer described as “one of the largest [seizures] in the force’s 39 year history”, West Midlands Police reported recovering six big cellophane-wrapped cardboard boxes containing cannabis, cocaine, and MDMA (“ecstasy”) in a police raid operation on the Maybrook Industrial Estate in the town on Wednesday.

The seized boxes, which had been loaded onto five freight pallets, contained 120 one-kilogram bags of cannabis, 50 one-kilogram bags of MDMA, and five one-kilogram bricks of cocaine. In a press release, West Midlands Police described what happened after officers found the drugs as they were being unloaded in the operation. “When officers opened the boxes they discovered a deep layer of protective foam chips beneath which the drugs were carefully layered”, the force said. “All the drugs were wrapped in thick plastic bags taped closed with the cannabis vacuum packed to prevent its distinctive pungent aroma from drawing unwanted attention.” Police moved the drugs via forklift truck to a flatbed lorry to remove them.

Detective Sergeant Carl Russell of West Midlands Police’s Force CID said the seizure was the largest he had ever made in the 24 years he has been in West Midlands Police and one of the biggest seizures the force has made since its formation in 1974. “The impact this seizure will have on drug dealing in the region and the UK as a whole cannot be underestimated”, he said. “The drugs had almost certainly been packed to order ready for shipping within Britain but possibly even further afield. Our operation will have a national effect and we are working closely with a range of law enforcement agencies to identify those involved in this crime at whatever level.”

Expert testing on the drugs is ongoing. Estimates described as “conservative” suggest the value of the drugs amounts to £10 million (about US$16.4 million or €12 million), although they could be worth as much as £30 million, subject to purity tests, police said.

Police arrested three men at the unit on suspicion of supplying a controlled drug. The men, a 50-year-old from Brownhills, a 51-year-old from the Norton area of Stoke-on-Trent in Staffordshire, and one aged 53 from Brownhills, have been released on bail as police investigations to “hunt those responsible” continue. West Midlands Police told Wikinews no person has yet been charged in connection with the seizure. Supplying a controlled drug is an imprisonable offence in England, although length of jail sentences vary according to the class and quantity of drugs and the significance of offenders’ roles in committing the crime.

Thursday, June 25, 2015

Live music venues in Edinburgh, Scotland are awaiting a review later this year on the 2005 licensing policy, which places limitations on the volume of amplified music in the city. Investigating into how the policy is affecting the Edinburgh music scene, a group of Wikinews writers interviewed venue owners, academics, the City of Edinburgh Council, and local band The Mean Reds to get different perspectives on the issue.

Since the clause was introduced by the government of the city of Edinburgh, licensed venues have been prohibited from allowing music to be amplified to the extent it is audible to nearby residential properties. This has affected the live music scene, with several venues discontinuing regular events such as open mic nights, and hosting bands and artists.

Currently, the licensing policy allows licensing standards officers to order a venue to cease live music on any particular night, based on a single noise complaint from the public. The volume is not electronically measured to determine if it breaches a decibel volume level. Over roughly the past year there have been 56 separate noise complaints made against 18 venues throughout the city.

A petition to amend the clause has garnered over 3,000 signatures, including the support of bar owners, musicians, and members of the general public.

On November 17, 2014, the government’s Culture and Sport Committee hosted an open forum meeting at Usher Hall. Musicians, venue owners and industry professionals were encouraged to provide their thoughts on how the council could improve live music in the city. Ways to promote live music as a key cultural aspect of Edinburgh were discussed and it was suggested that it could be beneficial to try and replicate the management system of live music of other global cities renowned for their live music scenes. However, the suggestion which prevailed above all others was simply to review the existing licensing policy.

Councillor (Cllr) Norma Austin-Hart, Vice Convenor of the Culture and Sport Committee, is responsible for the working group Music is Audible. The group is comprised of local music professionals, and councillors and officials from Edinburgh Council. A document circulated to the Music is Audible group stated the council aims “to achieve a balance between protecting residents and supporting venues”.

Following standard procedure, when a complaint is made, a Licensing Standards Officer (LSO) is dispatched to investigate the venue and evaluate the level of noise. If deemed to be too loud, the LSO asks the venue to lower the noise level. According to a document provided by the City of Edinburgh Council, “not one single business has lost its license or been closed down because of a breach to the noise condition in Edinburgh.”

In the Scotland Licensing Policy (2005), Clause 6.2 states, “where the operating plan indicates that music is to be played in a premises, the board will consider the imposition of a condition requiring amplified music from those premises to be inaudible in residential property.” According to Cllr Austin-Hart, the high volume of tenement housing in the city centre makes it difficult for music to be inaudible.

During the Edinburgh Festival Fringe during the summer, venues are given temporary licences that allow them to operate for the duration of the festival and under the condition that “all amplified music and vocals are controlled to the satisfaction of the Director of Services for Communities”, as stated in a document from the council. During the festival, there is an 11 p.m. noise restriction on amplified music, and noise may be measured by Environmental Health staff using sophisticated equipment. Noise is restricted to 65dB(A) from the facades of residential properties; however, complaints from residents still occur. In the document from the council, they note these conditions and limitations for temporary venues would not necessarily be appropriate for permanent licensed premises.

In a phone interview, Cllr Austin-Hart expressed her concern about the unsettlement in Edinburgh regarding live music. She referenced the closure of the well-known Picture House, a venue that has provided entertainment for over half a century, and the community’s opposition to commercial public bar chain Wetherspoon buying the venue. “[It] is a well-known pub that does not play any form of music”, Cllr Austin-Hart said. “[T]hey feel as if it is another blow to Edinburgh’s live music”. “[We] cannot stop Wetherspoon’s from buying this venue; we have no control over this.”

The venue has operated under different names, including the Caley Palais which hosted bands such as Queen and AC/DC. The Picture House opened in 2008.

One of the venues which has been significantly affected by the licensing laws is the Phoenix Bar, on Broughton Street. The bar’s owner, Sam Roberts, was induced to cease live music gigs in March, following a number of noise complaints against the venue. As a result, Ms Roberts was inspired to start the aforementioned petition to have Clause 6.2 of the licensing policy reviewed, in an effort to remove the ‘inaudibility’ statement that is affecting venues and the music scene.

“I think we not only encourage it, but actively support the Edinburgh music scene,” Ms Roberts says of the Phoenix Bar and other venues, “the problem is that it is a dying scene.”

When Ms Roberts purchased the venue in 2013, she continued the existing 30-year legacy established by the previous owners of hosting live acts. Representative of Edinburgh’s colourful music scene, a diverse range of genres have been hosted at the venue. Ms Roberts described the atmosphere when live music acts perform at her venue as “electric”. “The whole community comes together singing, dancing and having a party. Letting their hair down and forgetting their troubles. People go home happy after a brilliant night out. All the staff usually join in; the pub comes alive”. However licensing restrictions have seen a majority of the acts shut down due to noise complaints. “We have put on jazz, blues, rock, rockabilly, folk, celtic and pop live acts and have had to close everything down.” “Residents in Edinburgh unfortunately know that the Council policy gives them all the rights in the world, and the pubs and clubs none”, Ms Roberts clarified.

Discussing how inaudibility has affected venues and musicians alike, Ms Roberts stated many pubs have lost profit through the absence of gigs, and trying to soundproof their venue. “It has put many musicians out of work and it has had an enormous effect on earnings in the pub. […] Many clubs and bars have been forced to invest in thousands of pounds worth of soundproofing equipment which has nearly bankrupted them, only to find that even the tiniest bit of noise can still force a closure. It is a ridiculously one-sided situation.” Ms Roberts feels inaudibility is an unfair clause for venues. “I think it very clearly favours residents in Edinburgh and not business. […] Nothing is being done to support local business, and closing down all the live music venues in Edinburgh has hurt financially in so many ways. Not only do you lose money, you lose new faces, you lose the respect of the local musicians, and you begin to lose all hope in a ‘fair go’.”

With the petition holding a considerable number of signatures, Ms Roberts states she is still sceptical of any change occurring. “Over three thousand people have signed the petition and still the council is not moving. They have taken action on petitions with far fewer signatures.” Ms Roberts also added, “Right now I don’t think Edinburgh has much hope of positive change”.

Ms Roberts seems to have lost all hope for positive change in relation to Edinburgh’s music scene, and argues Glasgow is now the regional choice for live music and venues. “[E]veryone in the business knows they have to go to Glasgow for a decent scene. Glasgow City Council get behind their city.”

Ms Martina Cannon, member of local band The Mean Reds, said a regular ‘Open Mic Night’ she hosted at The Parlour on Duke Street has ceased after a number of complaints were made against the venue. “It was a shame because it had built up some momentum over the months it had been running”. She described financial loss to the venue from cancelling the event, as well as loss to her as organiser of the event.

Sneaky Pete’s music bar and club, owned by Nick Stewart, is described on its website as “open and busy every night”.”Many clubs could be defined as bars that host music, but we really are a music venue that serves drinks”, Mr Stewart says. He sees the live music scene as essential for maintaining nightlife in Edinburgh not only because of the economic benefit but more importantly because of the cultural significance. “Music is one of the important things in life. […] it’s emotionally and intellectually engaging, and it adds to the quality of life that people lead.”

Sneaky Pete’s has not been immune to the inaudibility clause. The business has spent about 20,000 pounds on multiple soundproofing fixes designed to quell complaints from neighboring residents. “The business suffered a great deal in between losing the option to do gigs for fear of complaints, and finishing the soundproofing. As I mentioned, we are a music business that serves drinks, not a bar that also has music, so when we lose shows, we lose a great deal of trade”, said Mr Stewart.

He believes there is a better way to go about handling complaints and fixing public nuisances. “The local mandatory condition requiring ‘amplified music and vocals’ to be ‘inaudible’ should be struck from all licenses. The requirement presupposes that nuisance is caused by music venues, when this may not reasonably be said to be the case. […] Nuisance is not defined in the Licensing Act nor is it defined in the Public Health Act (Scotland) 2008. However, The Consultation on Guidance to accompany the Statutory Nuisance Provisions of the Public Health etc (Scotland) Act 2008 states that ‘There are eight key issues to consider when evaluating whether a nuisance exists[…]'”.

The eight key factors are impact, locality, time, frequency, duration, convention, importance, and avoidability. Stewart believes it is these factors that should be taken into consideration by LSOs responding to complaints instead of the sole factor of “audibility”.He believes multiple steps should be taken before considering revocation of licenses. Firstly, LSOs should determine whether a venue is a nuisance based on the eight factors. Then, the venue should have the opportunity to comply by using methods such as changing the nature of their live performances (e.g. from hard rock to acoustic rock), changing their hours of operation, or soundproofing. If the venue still fails to comply, then a board can review their license with the goal of finding more ways to bring them into compliance as opposed to revoking their license.

Nick Stewart has discussed his proposal at length with Music is Audible and said he means to present his proposal to the City of Edinburgh Council.

Dr Adam Behr, a music academic and research associate at the University of Edinburgh who has conducted research on the cultural value of live music, says live music significantly contributes to the economic performance of cities. He said studies have shown revenue creation and the provision of employment are significant factors which come about as a result of live music. A 2014 report by UK Music showed the economic value generated by live music in the UK in 2013 was £789 million and provided the equivalent of 21,600 full time jobs.

As the music industry is international by nature, Behr says this complicates the way revenue is allocated, “For instance, if an American artist plays a venue owned by a British company at a gig which is promoted by a company that is part British owned but majority owned by, say, Live Nation (a major international entertainment company) — then the flow of revenues might not be as straightforward as it seems [at] first.”

Despite these complexities, Behr highlighted the broader advantages, “There are, of course, ancillary benefits, especially for big gigs […] Obviously other local businesses like bars, restaurants and carparks benefit from increased trade”, he added.

Behr criticised the idea of making music inaudible and called it “unrealistic”. He said it could limit what kind of music can be played at venues and could force vendors to spend a large amount of money on equipment that enables them to meet noise cancelling requirements. He also mentioned the consequences this has for grassroots music venues as more ‘established’ venues within the city would be the only ones able to afford these changes.

Alongside the inaudibility dispute has been the number of sites that have been closing for the past number of years. According to Dr Behr, this has brought attention to the issue of retaining live music venues in the city and has caused the council to re-evaluate its music strategy and overall cultural policy.

This month, Dr Behr said he is to work on a live music census for Edinburgh’s Council which aims to find out what types of music is played, where, and what exactly it brings to the city. This is in an effort to get the Edinburgh city council to see any opportunities it has with live music and the importance of grassroots venues. The census is similar to one conducted in Victoria, Australia in 2012 on the extent of live music in the state and its economic benefit.

As for the solution to the inaudibility clause, Behr says the initial step is dialogue, and this has already begun. “Having forum discussion, though, is a start — and an improvement”, he said. “There won’t be an overnight solution, but work is ongoing to try to find one that can stick in the long term.”

Beverley Whitrick, Strategic Director of Music Venue Trust, said she is unable to comment on her work with the City of Edinburgh Council or on potential changes to the inaudibility clause in the Licensing Policy. However, she says, “I have been asked to assess the situation and make recommendations in September”.

According to The Scotsman, the Council is working toward helping Edinburgh’s cultural and entertainment scene. Deputy Council Leader Sandy Howat said views of the entertainment industry needs to change and the Council will no longer consider the scene as a “sideline”.

Senior members of the Council, The Scotsman reported, aim to review the planning of the city to make culture more of a priority. Howat said, “If you’re trying to harness a living community and are creating facilities for people living, working and playing then culture should form part of that.”

The review of the inaudibility clause in the Licensing Policy is set to be reviewed near the end of 2016 but the concept of bringing it forward to this year is still under discussion.

Thursday, March 9, 2006

University of Chicago, Illinois biologists Dr. Benjamin Voight, Dr. Sridhar Kudaravalli, Dr. Xiaoquan Wen and Dr. Jonathan Pritchard have identified regions of human DNA showing the strongest marks of natural selection within the last 5,000 to 15,000 years.

They found that many recent genetic changes are related to the development of agriculture. In particular, the genes for digestion of milk into adulthood occurred only after some level of domestication of animals. Most mammals drink milk only in infancy.

The work may shed light on the genetic factors involved in various human medical conditions, including high blood pressure and alcoholism.

The Chicago finding also contradicts the tacit assumption of much social science that human evolution “ground to a halt” in the distant past. Even evolutionary psychologists have tempered their claims based upon this assumption.

The study is based upon DNA changes found in three populations examined by the HapMap project: Africans, East Asians and Europeans.

The study has been published in PLOS-Biology.