Friday, March 16, 2007

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The Return of God? By John Humphrys. Lewis Wolpert debates William Lane Craig


Last Updated: 2:02am GMT 03/03/2007


A Hollywood director says he's found the bones of Jesus; thousands flock to a debate on divinity. John Humphrys, whose acclaimed radio series and writings on faith elicited a huge response, examines a surprising religious renaissance.

One of the stone ossuaries claimed by some, including the Hollywood film director James Cameron, to hold the bones of Jesus.
One of the stone ossuaries claimed by some, James Cameron among them, to hold the bones of Jesus

I've chaired enough conferences and public meetings over the years to know how difficult it is to get a decent crowd for a debate. You can tell the difference between amateurs in the business of organising events and professionals. The amateurs always put out a few extra chairs - just in case the crowd is bigger than they'd expected.

"It wouldn't do to force anyone to stand up, would it?" they ask you anxiously as you stand in the wings peering out at row after row of empty chairs, a few dozen lonely people hunkered down at the back so far from the stage you need semaphore to make contact. Professionals - especially political party organisers - do exactly the opposite.

They put out fewer chairs in the hall than they think they will need. What matters is filling every seat - and if a few people are standing at the back that's even better. The pro knows that half the people who say they will turn up probably won't bother - especially if they haven't had to pay for their tickets. Admittedly it's different if you have a very, very big name on the stage. Bill Clinton perhaps. Or Jade Goody. But William Lane Craig?

I'll bet most of you reading this haven't even heard of him. And yet, on a wet and windy winter's night a few days ago, he filled Methodist Central Hall in London. And it's a big hall: more than 2,000 seats. I'm being a little unkind to the other speaker in the debate: Lewis Wolpert. Prof Wolpert is well known for his attitude to God.


You get the gist of it from the title of his latest book, Six Impossible Things, stolen from what the Queen told Alice in Through the Looking Glass. Wolpert has no trouble filling a lecture theatre at his university, but he's a modest man and would be the first to admit that he'd struggle to draw a crowd of well over 2,000.

No, it was William Lane Craig - with a little help from God. I can say that with confidence because I asked the audience to put up their hands if they believed in God and all but a handful - maybe five per cent - did so. They were there to hear Craig and Wolpert debate the existence of God, but Wolpert knew he was beaten before he got to his feet.

There's a lot of God in Britain these days. Only this week we have had the bizarre claim by the Hollywood director James Cameron that he has found the bones of Jesus. If that's true it means Jesus died just like anyone else and the Christian religion is based on a lie.

You will note I said if that's true. I wrote in these pages just before Christmas about the extraordinary response to a series of interviews I did for Radio Four (Humphrys in Search of God). I had thousands of replies and, four months after the broadcasts, they're still coming.

At the time, I put it down to the bizarre nature of the programmes: grumpy old sod best known for duffing up politicians (that's me) bares his soul and asks some of the world's leading religious figures to show him God. But I'm not so sure any longer. I've been researching a book I'm writing based on the interviews (In God We Doubt) and I'm convinced there is something interesting going on.

Could it be that all those letters were a symptom of something bigger and that religion, which has taken a bit of a hammering over the last few decades in this country, is staging a comeback?

Prospect - the intellectuals' favourite monthly magazine - seems to think so. It has an influence out of all proportion to its tiny circulation and a reputation for its rigorously highbrow approach and its front page recently carried the pretty unambiguous headline: "God returns to Europe".

Dr Eric Kaufmann of Birbeck College, who wrote the piece, based on largely demographic evidence, said there is a religious revival "that may be as profound as that which changed the course of the Roman empire in the 4th century". Heady stuff if you are one of the believers. Mildly worrying if you're not. Seriously worrying if you are scared that what has happened in the United States might possibly be happening here.

Admittedly, that seems unlikely. Until the last congressional elections almost half the senators and congressmen were claimed by the religious fundamentalists as their own. Even if the politicians had wanted to they could not disown the religious Right.

There were too many votes at stake. There are some small signs that church attendance in America has peaked, but it would take a very brave politician to adopt a stance directly at odds with the more militant wing of God's army.

Look at the way the would-be candidates for the presidential election next year are all rushing to reassure the voters that they'll scarcely pull on their socks (or tights) in the morning without seeking God's guidance as to which foot should go in first. And look at how the most liberal of them huff and puff when their views are sought on religious touchstone issues such as abortion and stem cell research.

In America it is the militant wing of the churches that is making the running on the big social issues of the day rather than the more gentle version of religion about which we were once (mildly) enthusiastic in this country. Church attendance here has been falling for decades.

The C of E has made a pretty half-hearted attempt to persuade us that it's not as bad as the empty pews on Sunday mornings might suggest, but the figures tell a different story. Except, that is, for the evangelical wing of the church - the charismatics and the happy-clappies.

They have been thriving for the past few decades and continue to do so. The phenomenally successful "Alpha Courses" were born at Holy Trinity Brompton, the sort of church where you may well be invited to "give God a clap". I went there once and hated it. They claim that more than eight million people have signed up for the courses.

But the militant Christians are not having it all their own way. Militant atheists are taking the battle to them. Witness the extraordinary sales of Richard Dawkins's book The God Delusion and the battles on Britain's campuses for young hearts and minds. This is where William Lane Craig fits in.

I suggested to him that he is a sort of intellectual version of Billy Graham. He seemed happy enough with that description. He's actually an American evangelical academic who got one PhD from Birmingham University, another from Munich, is now Research Professor of Philosophy at a theological college in California and has built up a considerable reputation - hence that audience at Methodist Central - as a robust defender of his faith, desperate to take the battle to the atheistic enemy.

You may think I'm overdoing the military metaphors in this essay. But listen to what Craig says: "The average Christian does not realise there is an intellectual war going on in the universities and in the professional journals and scholarly societies. Christianity is being attacked from all sides as irrational or outmoded and millions of students, our future generations of leaders, have absorbed this viewpoint. This is a war which we cannot afford to lose."

Craig thinks the churches are filled with Christians who are "idling in intellectual neutral as Christians their minds are going to waste." If Christian laymen don't become intellectually engaged, he says, then "we are in serious danger of losing our children".

At first blush his approach is a million miles away from the evangelical rhetoric of hellfire and brimstone preachers, let alone the many millions of his fellow Americans who are proud to call themselves creationists. A tenth of all American religious colleges teach the literal truth of the book of Genesis.

God created the world 10,000 years ago and that's that. Dump Darwin in the bin along with all that stuff about fossils and fancy scientific techniques such as the dating of the ice core. Don't believe all that rubbish about dinosaurs roaming the planet 150 million years ago.

It's only 6,000 years since the divine creation of every kind of plant and creature so it follows that they could not have. My small son, who is one of the world's leading experts on dinosaurs, will be deeply disappointed, but the Bible is the literal word of God and that's that.

Well you don't get that sort of tosh from Professor Craig - though he is careful to draw a distinction between "young world creationists" (of whom he disapproves) and "creationists" of whom he is one. His approach, he insists, is based on reason and logic and not blind faith in a mysterious God. He even spends a great deal of time and effort explaining why the Big Bang is the only credible theory of how everything came into existence.

Given all this, you might assume that a debate between someone like Craig and someone like Wolpert - a Jew who lost his faith when he was 15 - would produce a riveting intellectual knockabout at least and a profound discussion of whether God is delusion or reality at best. Sadly it didn't work out like that. They might as well have been talking in different languages.

Here's the essence of Craig's case:

  • God created the universe. The proof lies in the premise that whatever begins to exist has a cause. The universe began to exist; therefore it has a cause. It was brought into existence by something which is greater than (and beyond) it. And that something was a "personal being".
  • God "fine tunes" the universe for ever. There is no other logical explanation for the way things operate.
  • Without God there can be no set of moral values.
  • The "historical facts" of the life of Jesus prove the basis for Christianity.
  • God can be known and experienced.
  • And here's the essence of Wolpert's rebuttal: it's all bunkum. Every bit of it.

    Of course he had more to say than that and he said it with wit and growing weariness. But how can an atheist genuinely engage intellectually with a believer? If God created the universe, Wolpert wanted to know, what created God? An impossible and ridiculous question, says Craig, because nothing could have created God. God existed before time.

    If you believe that, it seems to me, everything follows. If you don't, none of it does. What explanation does Wolpert have for the creation of the universe? He doesn't know and he's not the least ashamed to admit it. Craig insisted that it was incumbent on Wolpert to prove that God is an illusion. Wolpert insisted it was the other way around.

    Yet here, facing Wolpert, was a great sea of mostly young faces. Bright young people, most of them at university and almost all of them more than happy to believe in God and everything Craig had to tell them. Doesn't that prove something?

    Wolpert knew he had no chance of changing their minds. Nor, he suggested, did he particularly want to - because religion is not such a bad thing and it makes us feel better about ourselves. That's why we believe. And the propensity to believe is in our genes. None of it has anything to do with the existence of God.

    I spent two hours on the morning of the debate talking to Craig (he's known as Bill) across my kitchen table. At times I felt like banging my head on it. We got to the stage, inevitably, of arguing about whether he knows there is a God or believes there is a God. I asked him if his arguments for the existence of God amount to proof.

    He hesitated about that "because very often people associate proof with 100 per cent certainty or a mathematical certainty and I'm not claiming that. By proof what I would mean would be a cogent argument and a cogent argument philosophically would be an argument that is logically valid.

    It has true premises and the premises are more plausible than their contradictories. And if you have those elements then I think there are good arguments for the existence of God." But if you style yourself, as he does, a "Christian philosopher who is an activist as a Christian" aren't you bound to believe that? Doesn't everything flow from your belief?

    The most difficult question is: what created the universe? If the answer is God, then the second most difficult is: why? Craig's answer, when you've boiled everything else away, is that God did it for our benefit. That strikes me as strange for many reasons, not least because so many of us lead hellish lives. But apparently that's not the point. The point is that we are all going to experience the infinite love and mercy of God if we are prepared to accept him. Just as Craig has done.

    And that's the nub of it, isn't it? At the end of the debate I asked him a hypothetical question. Assuming (big assumption I know) that Lewis Wolpert had been able to demolish his arguments, would that have destroyed his faith? His answer was no. That had to be his answer. If faith can be proved, then it's not faith. I know that bloody table exists; I don't believe it.

    So how did he come by his faith in the first place? He found a girl. He'd "begun to ask the big questions in life" and didn't find any answers in his church. And then one day..."I sat behind this radiant, happy person. She was so happy all the time it just made me sick.

    I asked her one day what she was so happy about and she said it's because I know Jesus Christ is my personal saviour." Then she told him: "He loves you, Bill" and he had "never heard that before and it just overwhelmed me."

    So here is this man who can quote at length just about every philosopher you have ever heard of and (in my case) many you've never heard of. Who analyses their arguments in detail. Who talks about string theory and quantum mechanics with all the ease of an expert in the field.

    Who seems genuinely to believe that his arguments prove the existence of God and who wants every Christian student in the land to get out there and deliver the message. And who came to it all because of a happy, smiling girl who sat in front of him in a German lesson 30 years ago.

    No wonder Lewis Wolpert couldn't get a grip on him. You can't argue with the proof of a smiling girl.

    That's fair enough. I suppose everyone comes to their faith in their own way. But it worries me when Craig says that without God life itself is absurd: "It means that the life we have is without ultimate significance, value or purpose."

    The morning after the debate I read about a young woman called Josie Grove who had just died. She'd been a talented artist, a champion swimmer and, when she was 14, she was diagnosed with acute myeloid leukaemia. They did what they could for her but eventually she refused any more treatment because she wanted to die in peace at home. She was, by all accounts, a wonderful and very brave young woman. Here's what she said shortly before her death:

    "If I have given courage to others suffering from leukaemia, then my life has been as full as if I had lived to be a hundred. The main thing in life is to help other people and I don't need to live to be a hundred to do that."

    One has to respect Prof Craig's belief. But as a statement of what life is about, I'd prefer Josie's.


    reposted from: daily telegraph
    my: highlights / emphasis / key points / comments

    Humanist Laureates

    The International Academy Of Humanism


    The International Academy of Humanism was established to recognize distinguished humanists and to disseminate humanistic ideals and beliefs. The members of the academy, listed below, (1) are devoted to free inquiry in all fields of human endeavor, (2) are committed to a scientific outlook and the use of the scientific method in acquiring knowledge, and (3) uphold humanist ethical values and principles.

    The academy's goals include furthering respect for human rights, freedom, and the dignity of the individual; tolerance of various viewpoints and willingness to compromise; commitment to social justice; a universalistic perspective that transcends national, ethnic, religious, sexual, and racial barriers; and belief in a free and open pluralistic and democratic society.

    Humanist Laureates

    • Pieter Admiraal (medical doctor, The Netherlands)
    • Ruben Ardila (professor of psychology, Universidad de Colombia)
    • Kurt Baier (professor of philosophy, University of Pittsburgh)
    • Yelena Bonner (human rights defender, Commonwealth of Independent States)
    • Mario Bunge (professor of philosophy of science, McGill University)
    • Jean-Pierre Changeux (College de France and Institut Pasteur)
    • Patricia Smith Churchland (professor of philosophy, University of California, San Diego)
    • Sir Arthur C. Clarke
    • Bernard Crick (professor of politics, University of London)
    • Richard Dawkins (New College Fellow, Oxford University)
    • José Delgado (chairperson of the Department of Neuropsychiatry, University of Madrid)
    • Umberto Eco
    • Luc Ferry (professor of philosophy, Sorbonne and University of Caen)
    • Yves Galifret (professor of physiology at the Sorbonne and director of l'Union Rationaliste)
    • Johan Galtung (professor of sociology, University of Oslo)
    • Vitalii L. Ginzburg (Nobel laureate, Academy of Sciences, Russia)
    • Adolf Grünbaum (Professor and Chair, Center for Philosophy of Science, University of Pittsburgh)
    • Murray Gell-Mann (Nobel Laureate in physics, California Institute of Technology)
    • Herbert Hauptman (Nobel Laureate and professor of biophysical science, SUNY at Buffalo)
    • Donald Johanson (Institute of Human Origins)
    • Sergei Kapitza (physicist, Insitute of Physics and Technology)
    • George Klein (cancer researcher, Sweden)
    • György Konrád (novelist, Hungary)
    • Thelma Lavine (Clarence J. Robinson Professor of Philosophy, George Mason University)
    • José Leite Lopes (director, Centro Brasileiro de Pesquisas Fisicas)
    • Paul MacCready (Chairman, AeroVironment, Inc.)
    • Adam Michnik (historian and writer, Poland)
    • Conor Cruise O'Brien (author, Ireland)
    • Wardell Baxter Pomeroy (psychotherapist and author)
    • Marcel Roche (permanent delegate to UNESCO from Venezuela)
    • Richard Rorty (professor of philosophy, University of Virginia)
    • Salman Rushdie (author, United Kingdom)
    • Léopold Sédar Senghor (former president, Senegal)
    • Peter Singer (Princeton University, United States)
    • Wole Soyinka (Nobel Laureate in Literature, Nigeria)
    • Svetozar Stojanovic (professor of philosophy, University of Belgrade)
    • Thomas Szasz (professor of psychiatry, SUNY Medical School)
    • Rob Tielman (copresident, International Humanist and Ethical Union)
    • Alberto Hidalgo Tuñón (president of the Sociedad Asturiana de Filosofia, Oviedo, Spain)
    • Simone Veil (former president, European Parliament, France)
    • Kurt Vonnegut, Jr. (novelist)
    • Mourad Wahba (professor of education, University of Ain Shams, Cairo)
    • James D. Watson (Nobel laureate and co-discoverer of DNA, United States)
    • Harvey Weinstein (co-chairman, Miramax Films, United States)
    • G. A. Wells (professor of German, University of London)
    • Edward O. Wilson (professor of entomology, Harvard.)

    Deceased

    • George O. Abell
    • Steve Allen
    • Isaac Asimov
    • Sir Alfred J. Ayer
    • R. Nita Barrow
    • Sir Isaiah Berlin
    • Brand Blanshard
    • Sir Hermann Bondi
    • Bonnie Bullough
    • Francis Crick
    • Milovan Djilas
    • Paul Edwards
    • Sir Raymond Firth
    • Joseph F. Fletcher III
    • Betty Friedan
    • Stephen Jay Gould
    • Sidney Hook
    • Lawrence Kohlberg
    • Franco Lombardi
    • Jolé Lombardi
    • André Michael Lwoff
    • Ernest Nagel
    • George Olincy
    • Indumati Parikh
    • John Passmore
    • Octavio Paz
    • Chaim Perelman
    • Sir Karl Popper
    • W. V. Quine
    • Max Rood
    • Carl Sagan
    • Andrei Sakharov
    • V. M. Tarkunde
    • Richard Taylor
    • Sir Peter Ustinov
    • Lady Barbara Wooton

    Secretariat

    • Paul Kurtz (professor emeritus of philosophy, SUNY at Buffalo, editor in chief of Free Inquiry) President
    • David Koepsell, Executive Director
    • Vern Bullough (professor of history, California State University, Northridge)
    • Antony Flew (professor emeritus of philosophy, Reading University)
    • Gerald Larue (professor emeritus of archaeology and biblical studies, University of Southern California)
    • Jean-Claude Pecker (professor of astrophysics, College de France, Academie des Sciences)
    reposted from: Council for Secular Humanism
    my: highlights / emphasis / key points / comments

    Atheist - video

    Pause for Thought - The Irish News online

    Humanist Association member Brian McClinton says
    Pause for Thought - 1
    questioning beliefs is an essential part of the philosophical tradition.

    Pause for Thought - 2
    questioning beliefs is an essential part of the philosophical tradition.

    Pause for Thought - 3
    explains the philosophy which is an alternative to religion.

    Source: Newsline 16 March 2007 newsline-admin@secularism.org.uk

    Paraglider is attacked by eagles at 8,200 feet

    Britain’s top woman paraglider told today how she cheated death after two huge Australian eagles attacked her 8,200 feet above the Outback.

    Nicky Moss, 38, said she thought “Why me?” when the eagles came screeching out of the sky and began shredding the wing of her paraglider over New South Wales this week.

    She spun out of control and into a terrifying freefall for 1600 feet when one of the eagles became entangled in the lines suspending her beneath the glider’s wing, causing it to collapse and sending them diving toward earth before it managed to free it itself.

    The wedge-tailed eagles are Australia’s largest bird of prey and are among the world’s biggest eagles. They swoop upon sheep and have wing spans of more than 7 1/2 feet.

    Ms Moss, who was training with the British team for the World Paragliding Championships, to be held in Australia, said the first she knew of the eagles was when she heard a screeching sound from behind. Until then she had been soaring on air currents above the border area of New South Wales and Queensland.

    “I looked around and couldn’t see anything, and then the next moment the top surface of my wing deformed as an eagle flew straight into the top of me.

    “It quite possibly ripped the canopy and then wheeled around and continued to have other goes for quite a long period of time,” Ms Moss said.

    “Another eagle actually came in and joined it. It was a pair of them. I was getting bombarded by wedge-tailed eagles. They tore my glider. There were quite big rips in it from their talons.

    “At one point one of them dived at me from behind and actually hit me on the back of the head and flew through the lines of my glider and got all tangled up.”

    “It collapsed the glider completely. So we were plummeting for 500 meters (1600 feet), probably something like that, before the eagle got himself out,” she said.

    Ms Moss said that she considered deploying her emergency parachute but decided that the eagles might also attack and damage that, leaving her with no back-up.

    She regained control of her paraglider after the eagle escaped from her control lines. But the birds continued to attack her.

    “I screamed at the eagles quite a bit. I just had to carry on flying. I got out of the skies as quickly as I could by doing some maneuvers, and about 300 feet from the ground the eagles left me alone. I landed quite easily and safely in a paddock.”

    Her dramatic brush with the eagles was seen from the ground by other competitors.


    reposted from: clipmarks / foxnews
    my: highlights / emphasis / key points / comments

    Clouded leopards of Borneo should be considered a separate species

    Island leopard deemed new species
    Two leopard species. Images: Naturepl.com/WWF-Canon


    Clouded leopards found on Sumatra and Borneo represent a new species, research by genetic scientists and the conservation group WWF indicates.

    Until now it had been thought they belonged to the species that is found on mainland southeast Asia.

    Scientists now believe the two species diverged more than one million years ago, and have evolved separately since.

    Clouded leopards are the biggest predators on Borneo, and can grow as large as small panthers.

    It's incredible that no-one has ever noticed these differences
    Andrew Kitchener
    The separation of the species was discovered by scientists at the US National Cancer Institute near Washington DC.

    "Genetic research results clearly indicate that the clouded leopards of Borneo should be considered a separate species," said Dr Stephen O'Brien, head of the Institute's Laboratory of Genomic Diversity.

    "DNA tests highlighted around 40 differences between the two species."

    Tell tails

    Supporting evidence came from examination of fur patterns. Leopards from Borneo and Sumatra have small "clouds" with many distinct spots within them, grey and dark fur, and twin stripes along their backs.

    On the prowl

    Their mainland cousins have large cloud markings on their skin with fewer, often faint, spots within the cloud markings, and are lighter and more tawny in colour.

    "The moment we started comparing the skins of the mainland clouded leopard and the leopard found on Borneo, it was clear we were comparing two different species," said Dr Andrew Kitchener from the National Museums of Scotland.

    "It's incredible that no-one has ever noticed these differences."

    WWF, which maintains a large conservation operation on Borneo, estimates there are between 5,000 and 11,000 clouded leopards on the island, with a further 3,000 to 7,000 on Sumatra.

    "The fact that Borneo's top predator is now considered a separate species further emphasises the importance of conserving the 'Heart of Borneo'," said WWF's Stuart Chapman, co-ordinator of a project seeking to preserve the island's wildlife.

    The three governments with territory on the island - Indonesia, Malaysia and Brunei - signed an agreement earlier this year pledging to protect the "Heart of Borneo", 200,000 square kilometres of rainforest in the middle of the island thought to be particularly high in biodiversity.

    links: Wildfacts - clouded leopard

    reposted from: bbc
    my: highlights / emphasis / key points / comments

    Drop 'kiss of life', urge medics

    Chest compressions
    Chest compressions help pump blood round the body
    Advising first-aiders to give the "kiss of life" is off-putting and unnecessary, say medics.

    Not only are bystanders less likely to help someone who has collapsed if they have to do mouth-to-mouth ventilation, many are unable to perform it properly.

    Chest compressions alone are just as good if not better in most cases, a Japanese study in The Lancet shows.

    They recommend resuscitation trainers revise their advice. But the British Heart Foundation disagrees.

    The current advice is to give mouth-to-mouth ventilation unless you are unable, or are unwilling.

    'Yuk' factor

    Studies show less than a third of people who collapse in public are helped by a bystander.

    HOW TO GIVE CPR
    Is the patient unresponsive? If so, shout for help
    Open airway
    If they're not breathing normally, call 999
    Then give 30 chest compressions at a rate of 100 times a minute
    Next, give two rescue breaths, then 30 chest compressions...repeat
    Source: Resuscitation Council (UK)

    Surveys reveal many would-be first-aiders are put off by the idea of giving the kiss of life - for fear of catching an infectious disease, for example.

    And when bystanders do assist, giving mouth-to-mouth can steal time from giving essential chest compressions.

    Furthermore, if the patient has collapsed because of a heart rather than a lung problem they should already have enough oxygen in their body to keep them going without needing rescue breaths from a bystander.

    Dr Ken Nagao and colleagues at the Surugadai Nihon University Hospital in Tokyo say in these circumstances it would be better for all parties to stick to giving chest compressions alone, which they called cardiac-only resuscitation.

    Chest compressions 'key

    They checked their theory by looking at the outcomes of more than 4,000 adult patients who had been helped by bystanders.

    They found chest-compression-only resuscitation was the clear winner compared with conventional CPR (cardiopulmonary resuscitation, or mouth-to-mouth breathing together with chest compressions).

    Colin Elding of the British Heart Foundation said a number of studies had shown it could be as effective as combined mouth-to-mouth ventilation and compression in many cases.

    But he said it was right for CPR guidelines to still include mouth-to-mouth.

    He added: "The current guidelines state, however, that for 'lay person' CPR, if the rescuer is unwilling or unable to give rescue breaths they should give chest compressions only and that these should be continuous at a rate of 100 per minute. The BHF believes this is sound advice.

    "Cardiac arrests are a serious problem in the UK, which is why the BHF recently launched its Doubt Kills campaign, to encourage people experiencing potential heart attack symptoms to call 999."

    Sources:
    reposted from: bbc
    my: highlights / emphasis / key points / comments

    the Chris Street blog: Researchers debunk belief species evolve faster in tropics

    the Chris Street blog: Researchers debunk belief species evolve faster in tropics

    Researchers debunk belief species evolve faster in tropics

    Cold is hot in evolution

    Reposted from PHYSORG:
    http://www.physorg.com/news93190618.html

    University of British Columbia researchers have discovered that contrary to common belief, species do not evolve faster in warmer climates.


    UBC Zoology PhD candidate Jason Weir and his mentor Prof. Dolph Schluter, director of the UBC Biodiversity Research Centre, charted the genetic family tree of 618 mammal and bird species in the Americas over the last several million years.

    By analyzing the DNAs of species that are closely related to one another, the researchers found that speciation – the process in which one species splits into two – takes place faster in temperate zones than in the tropics. Their findings are published in today's edition of the journal Science.

    "It's been long established that the tropics have more species, but it's not clear why," says Weir. "The common assumption is that species simply evolve faster in warmer climates."

    "Our analysis shows that new species actually evolve faster as we move towards the poles. It would take one species in the tropics three to four million years to evolve into two distinct species, whereas at 60 degrees latitude, it could take as little as one million years."

    The higher speciation rate in higher latitudes, however, is counteracted by a high extinction rate, both likely due to more intense climate fluctuations, says Weir.

    "In comparison, even though there is a lower speciation rate in the tropics, the stable environment contributes to an equally low extinction rate. As a result, more species survive. This could help explain why there are more species in general in warmer climates," says Weir.

    "In other words, there's a higher turnover of species in places like Canada, making it a hotbed of speciation, not the Amazon," says Schluter.

    Source: University of British Columbia

    reposted from: richarddawkins
    my: highlights / emphasis / key points / comments