Sunday, 13 October 2013

Unmatched Renown

"The Nobel has its rivals, but none combines the wealth and prestige of the prize, the range of its subjects, and its century-long record," the late science historian Burton Feldman wrote in The Nobel Prize: A History of Genius, Controversy, and Prestige. Feldman attributed the Nobel's "unmatched renown" to a combination of luck and design.
By design, the Nobel Prize drops a lot of Swedish kronor on its science awardees; some $1.25 million worth will be split among them this year. And it is awarded by royalty, handed over by King Carl XVI Gustaf of Sweden in a December 10 ceremony. Such a combination of money and prestige is tough to top in the modern world.
Feldman argued the Nobel was also lucky to be among the first awards that were international in scope, introduced just as the national rivalries and jealousies that would clash in World War I were reaching a fever pitch. "Science may speak a transnational language, but each year, as the new Nobels are announced, national scorecards and rivalries are anxiously scrutinized," Feldman wrote.
Why else do news stories about the Nobels begin with the national affiliation of the winners, which are carefully noted in the award announcements?
In the early years of the prize, the awards all went to Europeans, and after World War II, U.S. scientists took the lead, Pendlebury says. "Now, when I visit China, they ask, 'When will we have a first Nobel Prize in science?' I tell them it's coming." (A number of Chinese-born scientists have won Nobel Prizes for work done as citizens elsewhere.)

Nobel Prizes Started With a Bang

Blame it on Madame Curie. Mix the French-Polish physicist's early celebrity, some jousting for international prestige before World War I, and the surging importance of physical sciences over the last century, and you have the recipe that made the Nobel Prize—announced every year this week in October—the world's preeminent award.
Big headlines greeted three Americans on Monday after they earned the Nobel Prize in medicine. James Rothman, Randy Schekman, and Thomas Sudhof were honored for unraveling the mystery of how cells shuttle their goods around.
Similar acclaim greeted Belgium's François Englert and Scotland's Peter Higgs, who picked up the award in physics for first contemplating the existence of the subatomic Higgs boson particle, even though it was the least surprising announcement of a physics prize in decades.
The chemistry prize came on Wednesday, awarded to U.S. scientists Michael Levitt and Arieh Warshel, along with Martin Karplus of France's Université de Strasbourg and Harvard. It will be followed by the peace, literature, and economics prizes. Headlines will celebrate each one. (There is even a traditional parody: see "2013 Ig Nobels Honor Research on Beer Goggles, Cows Ready to Be Tipped.")
Why do we care about the Nobel Prize? Since 1901, the awards have been announced annually by the Swedish Academy of Sciences and the Karolinska Institutet in Stockholm, as directed by the will of Swedish "dynamite king" Alfred Nobel, who died in 1897. But why do they get such fanfare?
"There are other prizes, but none are the Nobel Prize," says Thomson Reuters science analyst David Pendlebury, whose team yearly predicts which researchers might be in line for the award. "I'm always surprised by who they pick. But they do an outstanding, thorough job every time." (For the record, Pendlebury and many others this year had their money on Higgs and Englert, after Europe's CERN lab detected a Higgs-like particle in their data last year.)

First Evidence Found of a Comet Strike on Earth

About 28 million years ago a comet exploded over Egypt, creating a 3600°F (2000°C) blast wave that spread out over the desert below. The fiery shockwave melted the sand, forming copious amounts of yellow silica glass scattered over 2,300 square miles (6,000 square kilometers) of the Sahara.
Polished into the shape of a scarab beetle, a large piece of this glass found its way into a brooch owned by the famed Egyptian boy king Tutankhamen.
"Because there is no sign of an impact crater, it has been a mystery as to what kind of celestial event actually could have caused this debris field, but a small, black stone found lying in the middle of the glass area caught our attention," said study co-author David Block, an astronomer at Wits University in Johannesburg, South Africa.
Saharan Surprise
A tiny slice of the black pebble was put through isotopic analysis, which definitely ruled out that it came from a meteor. Instead, the analysis showed that the pebble possessed the unique chemical signature of a comet, measured in terms of elements such as argon and carbon.
"It was then basically a matter of running the movie backwards in time and predicting what temperatures were needed to create the conditions we find that make up the fragment today," Block says. "So when I saw the result of the analyses, I was completely ecstatic to realize that such a piece of cosmic history has been found for the first time right on our doorstep."
While meteors are known to enter the Earth's atmosphere frequently—one can be seen as a shooting star every 15 minutes or so on any random night—not so with comets.
The implosions of comets in planetary atmospheres are exceedingly rare events—the only other definitive case of a comet hitting a planet was back in 1994 when comet Shoemaker-Levy 9 impacted Jupiter's atmosphere.
Astronomical Odds Inspire Caution
And it's because of this rarity that Earth scientist Andrew Glikson of the Australian National University in Canberra, who was not involved in this study, questions if these yellow glass objects, called tektites, might instead have been created through much more common meteoric events, as seen at many impact sites around the world.
"Why can't the material represent a large tektite formed by heating and melting of sand at the Earth's surface by an asteroid impact, such as, for example, the Australite tektites?" asks Glikson.
While this extraterrestrial glass is considered common around many impact sites,  geologist Gerald Johnson, who was not involved in the study, says that beyond the compelling evidence the team presents in their chemical workup of the black pebble, it's not surprising that the research community may be wary of these results.
"A comet, mostly water, vaporizes in the atmosphere and leaves little for the geologic record, while the 'dirt' incorporated in the comet also is disseminated widely and is unlikely to be found because of impact dispersal, surface weathering, and erosion," said Johnson, a meteor impact researcher at the College of William and Mary in Williamsburg, Virginia.
"Undoubtedly, the Earth has been hit numerous times by comets, but our knowledge of these is lacking because comets leave such a poor record ... so this discovery is amazing."
Solar System Origins
Microscopic dust particles from these icy interlopers have been collected from the upper atmosphere and from Antarctic ice, and have been scooped up by space probes.
But having a chance to study sizable comet material firsthand would be exceptional, and Block and his team believe it can offer a unique chance to study the birth of our solar system.
Cosmic particles called presolar grains formed in the stellar cloud of gas and dust that gave birth to our solar system, and are thought to have remained within comets and meteors.
"My bet is that this little rock will unlock some unique secrets in time to come, specifically because it appears packed with presolar grains," said Block.
The comet study will be published in an upcoming issue of Earth and Planetary Science Letters.

10 Cool Things You Didn't Know About Stephen Hawking

Even if you don't keep a close eye on new developments in physics, you've probably heard of the renowned physicist Stephen Hawking. He's prided himself on making his complex physical concepts accessible to the public and writing the bestseller, "A Brief History of Time."
And if you are a fan of Conan O'Brien, "The Simpsons" or "Star Trek," you might have seen him brandishing his cool wit during guest appearances on those shows.
Even if you are familiar with his academic work, however, there are many interesting facts you might not know about Hawking, stretching from his time at school and gradual development of disability to his opinions on the future of the human race.
Many find it surprising, for instance, that, despite his influential body of work, Hawking hasn't yet been awarded the Nobel Prize. We'll talk about some of the remarkable distinctions he has received, however.
Another interesting fact: Hawking was born on Jan. 8, 1942, which just happened to be the 300th anniversary of Galileo's death.
But this has just been the warm-up. Next, we'll delve into some fascinating and unexpected facts about Hawking, including some things about his profoundly inspirational story.

Monday, 7 October 2013

Magic Mushrooms’ Can Improve Spiritual Benefits and Psychological Health

The psychedelic drug in magic mushrooms may have lasting medical and spiritual benefits, according to new research from Johns Hopkins School of Medicine. The mushroom-derived hallucinogen, called psilocybin, is known to trigger transformative spiritual states, but at high doses it can also result in “bad trips” marked by terror and panic. The trick is to get the dose just right, which the Johns Hopkins researchers report having accomplished.

In their study, the Hopkins scientists were able to reliably induce transcendental experiences in volunteers, which offered long-lasting psychological growth and helped people find peace in their lives — without the negative effects.

“The important point here is that we found the sweet spot where we can optimize the positive persistent effects and avoid some of the fear and anxiety that can occur and can be quite disruptive,” says lead author Roland Griffiths, professor of behavioral biology at Hopkins.

Giffiths’ study involved 18 healthy adults, average age 46, who participated in five eight-hour drug sessions with either psilocybin — at varying doses — or placebo. Nearly all the volunteers were college graduates and 78% participated regularly in religious activities; all were interested in spiritual experience.

Fourteen months after participating in the study, 94% of those who received the drug said the experiment was one of the top five most meaningful experiences of their lives; 39% said it was the single most meaningful experience.

Critically, however, the participants themselves were not the only ones who saw the benefit from the insights they gained: their friends, family member and colleagues also reported that the psilocybin experience had made the participants calmer, happier and kinder.

Ultimately, Griffiths and his colleagues want to see if the same kind of psychedelic experience could help ease anxiety and fear over the long term in cancer patients or others facing death. And following up on tantalizing clues from early research on hallucinogenic drugs like LSD, mescaline and psilocybin in the 1960s (which are all now illegal), researchers are also studying whether transcendental experiences could help spur recovery from addiction and treat other psychological problems like depression and post-traumatic stress disorder.

For Griffiths’ current experiment, participants were housed in a living room-like setting designed to be calm, comfortable and attractive. While under the influence, they listened to classical music on headphones, wore eyeshades and were instructed to “direct their attention inward.”

Each participant was accompanied by two other research-team members: a “monitor” and an “assistant monitor,” who both had previous experience with people on psychedelic drugs and were empathetic and supportive. Before the drug sessions, the volunteers became acquainted enough with their team so that they felt familiar and safe. Although the experiments took place in the Hopkins hospital complex in order to ensure prompt medical attention in the event that it was needed, it never was.

As described by early advocates of the use of psychedelics — from ancient shamans to Timothy Leary and the Grateful Dead — the psilocybin experience typically involves a sense of oneness with the universe and with others, a feeling of transcending time, space and other limitations, coupled with a sense of holiness and sacredness. Overwhelmingly, these experiences are difficult to put into words, but many of Griffiths’ participants said they were left with the sense that they understood themselves and others better and therefore had greater compassion and patience.

“I feel that I relate better in my marriage. There is more empathy — a greater understanding of people and understanding their difficulties and less judgment,” said one participant. “Less judging of myself, too.”

Another said: “I have better interaction with close friends and family and with acquaintances and strangers. … My alcohol use has diminished dramatically.”

To zero in on the “sweet spot” of dosing, Griffiths started half the volunteers on a low dose and gradually increased their doses over time (with placebo sessions randomly interspersed); the other half started on a high dose and worked their way down.

Those who started on a low dose found that their experiences tended to get better as the dose increased, probably because they learned what to expect and how to handle it. But people who started with high doses were more likely to experience anxiety and fear (though these feeling didn’t last long and sometimes resolved into euphoria or a sense of transcendence).

“If we back the dose down a little, we have just as much of the same positive effects. The properties of the mystical experience remain the same, but there’s a fivefold drop in anxiety and fearfulness,” Griffiths says.

Some past experiments with psychedelics in the ’60s used initial high doses of the drugs — the “blast people away with a high dose” model, says Griffiths — to try to treat addiction. “Some of the early work in addictions was done with the idea of, ‘O.K., let’s model the ‘bottoming-out’ crisis and make use of the dark side of [psychedelic] compounds. That didn’t work,” Griffiths says.

It may even have backfired: other research on addictions shows that coercion, humiliation and other attempts to produce a sense of “powerlessness,” tend to increase relapse and treatment dropout, not recovery. (And the notorious naked LSD encounter sessions conducted with psychopaths made them worse, too.)

Griffiths is currently seeking patients with terminal cancer to participate in his next set of experiments (for more information on these studies, click here); because psychedelics often produce a feeling of going beyond life and death, they are thought to be especially likely to help those facing the end of life. Griffiths is also studying whether psilocybin can help smokers quit.

Griffiths and other researchers like him are hoping to bring the study of psychedelics into the future. They want to build on the promise that some of the early research showed, while avoiding the bad rep and exaggerated claims — for example, that LSD was harmless and could usher in world peace — that became associated with the drugs when people started using them recreationally in the 1960s. The resulting negative publicity helped shut down the burgeoning research.

This time around, caution may be paying off. Dr. Jerome Jaffe, America’s first drug czar, who was not involved with the research, said in a statement, “The Hopkins psilocybin studies clearly demonstrate that this route to the mystical is not to be walked alone. But they have also demonstrated significant and lasting benefits. That raises two questions: could psilocybin-occasioned experiences prove therapeutically useful, for example in dealing with the psychological distress experienced by some terminal patients?

“And should properly-informed citizens, not in distress, be allowed to receive psilocybin for its possible spiritual benefits, as we now allow them to pursue other possibly risky activities such as cosmetic surgery and mountain-climbing?”