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d'Espagnat takes big prize for work on quantum mechanics

Earlier this week, the Templeton Foundation announced the 2009 winner of its $1.4 million Templeton Prize, French physicist and philosopher Bernard d’Espagnat. He is best known for his work to understand and test one of the strangest predictions of the theory of quantum mechanics: that particles are uncannily good players of The Newlywed Game. Pairs of them can give exactly the same responses to measurements conducted on them at the same time in isolated booths.

In the 1960s, physicist John Stewart Bell derived a set of mathematical inequalities that the responses would obey if the particles had some kind of a built-in cheat sheet. But d’Espagnat, Alain Aspect, and other experimenters found that particles violate these inequalities. Somehow the particles retain an intimate connection that transcends space. Physicists, even the most romantically inclined among them, have yet to fathom it.

Which came first--galaxies or black holes?

LONG BEACH, CALIF.—One of the oddities of the universe revealed over the past decade is that galaxies and the giant black holes at their hubs fit together as if they were made for each other. This is one of those facts of life that sound obvious at first glance, but get stranger the more you think about them.

A giant black hole is a formidable beast, surely able to bend the surrounding swarm of stars to its will. Yet even a giant black hole is still fairly small by the standards of a galaxy, so the galaxy should pay little heed to the monster within. The monster, for its part, is in direct contact with only a fairly small neighborhood and should be oblivious to what happens in the galaxy at large.

Yet astronomers find that black holes consistently have about 0.1 percent of the mass of their galaxies—or, more precisely, of the portion of their galaxies that has an spheroidal shape (which, for an spheroidal galaxy, is the whole thing and, for a spiral galaxy such as our Milky Way, is only the innermost parts). Some astronomers argue that the black hole mass is related not to the mass of the galaxy per se, but to the velocity of the stars, but it amounts to much the same thing: black holes and their host galaxies are blood brothers.

Did the universe mature at an early age?

LONG BEACH, CALIF.—You might think that the universe 11.5 billion years ago was in a more primitive state than it is today. Barely two billion years had passed since the big bang, our Milky Way galaxy was still taking shape, and billions more years would pass before the sun pulled itself together. Yet astronomers have come to realize that the universe was actually quite precocious. Even by that early stage, much of it had already seen many cycles of stellar birth and death.

The latest hint of its precocity came yesterday when astronomers announced that cosmic gas in that period, seen when backlit by a gamma-ray burst (a gigantic stellar explosion), contained molecular hydrogen and carbon monoxide—the first time astronomers have discovered molecules, as opposed to isolated atoms or ions, in the light of a gamma-ray burst. The molecules’ presence indicates that the galaxy where the burst occurred was nearly as chemically developed as the present-day Milky Way. Jason Xavier Prochaska of the University of California, Santa Cruz, and his colleagues announced the discovery at the American Astronomical Society’s meeting being held here this week.

The Milky Weigh Galaxy

LONG BEACH, CALIF.—One of the unnerving aspects of astronomy as a science is how astronomers continue to argue over measurements you’d have thought they settled long ago. A good recent example is the mass of our own Milky Way galaxy. Estimates keep swinging back and forth, and our galaxy and the Andromeda galaxy periodically switch places as the alpha galaxy of the local cosmos. A new study announced at the American Astronomical Society's conference suggests that astronomers may finally be starting to converge on a consensus—and, in a counterexample to the usual trend of relegating humanity to the cosmic backwaters, our Milky Way looks like the bigger one after all. (My colleague Steve Mirsky also describes the study on today’s podcast.)

Artist's conception of Milky WayTo weigh the Milky Way, Mark Reid of the Harvard-Smithsonian Center for Astrophysics and his colleagues tracked the motion of bright gaseous clouds in 12 star-forming regions scattered over the galaxy. They observed the clouds with the Very Long Baseline Array, a network of radio telescopes stretching from Hawaii to St. Croix which work in unison as a single planet-sized telescope. The network is so sharp-eyed that it can see clouds on the other side of the galaxy inching across the sky. The team combined these observations with measurements of the Doppler effect to deduce the clouds’ full three-dimensional orbital velocity: 254 +/– 16 kilometers per second.

Chris Anderson's Neo-Positivism

Wired editor Chris Anderson has a provocative essay this month arguing that data-mining has gotten so good at identifying correlations that scientists don't even need explanatory models anymore:

The new availability of huge amounts of data, along with the statistical tools to crunch these numbers, offers a whole new way of understanding the world. Correlation supersedes causation, and science can advance even without coherent models, unified theories, or really any mechanistic explanation at all.

Oh geez. Is Anderson saying this just to get a rise out of the rest of us? Does he really think that the ability to reproduce observations counts as understanding?

John Timmer of ArsTechnica has a good critique of this argument. I'd just add that the data-mining examples Anderson offers are themselves based on models (for example, Venter's gene-sequencing system requires knowledge of the basic structure of genes) and that fundamental physics works because the underlying reality of nature has proven to be less complex than what we directly see.

Is a shuttle rescue mission worth it?

Over at Nature, Zeeya Merali (a former AAAS Media Fellow here at Sci Am) has an interesting description of plans to keep the Endeavour shuttle on standby in case something goes wrong with Atlantis during the Hubble servicing mission this fall. I think it's worth asking two hard questions. First, is the cost of preparing a rescue mission justified by the likelihood (estimated at one in 400) of its happening? Second, would the cost of such a mission, if it came to pass, be justified?

The average shuttle flight costs $450 million, so a rescue would amount to $65 million per astronaut saved. (It would, of course, also save one other life: NASA's.) That is 10 times as much as society typically spends to save lives through, for example, environmental or workplace safety regulations. To be sure, there is a wide range of cost per life saved -- people are notoriously inconsistent about risk.

Is M. Night Shyamalan anti-scientific?

As part of the publicity for The Happening, writer-director M. Night Shyamalan gave a number of interviews to science journalists, including me, Andy Revkin, and Ira Flatow. And what Shymalan said has come in for some criticism: that he incorrectly called the placebo effect inexplicable, misrepresented Einstein's religious beliefs, and at times sounded downright crypto-creationist.

I offered some mild criticism of my own in my podcast, but I think the harsher criticism misses the point. Shyamalan is not a deep thinker about science. He never claimed he was. He's in the business of mass entertainment. Moreover, he has been fairly explicit about the film's religious themes, so nobody should be surprised by them.

A/C vs. Heating

This month's Wired magazine has a cheeky cover story questioning various articles of environmental folk wisdom -- a useful but fraught task. The most novel claim is that air conditioning uses less energy than heating -- that we'd all be better off living in Phoenix and cooling ourselves off, than in New York and heating ourselves up. The argument is based on the indoor-outdoor temperature difference:

When it's 0 degrees outside, you've got to raise the indoor thermometer to 70 degrees. In 110-degree weather, you need to change the temperature by only 40 degrees to achieve the same comfort level.

But RealClimate has dissected the argument. Burning fuel to produce heat is, almost by definition, 100 percent efficient, whereas generating electricity and running the a/c involve heavy losses:

Put it all together with the energy efficiency of the air conditioner itself and air conditioning comes in at a whopping 2.19 times less efficient than heating. for a given amount of temperature difference between house and environment.

According to degreedays.net, Phoenix has about 5000 cooling degree-days (when the daily average temperature is above 65) and 1100 heating degree-days (below 65). New York City has about 1200 cooling degree-days and 4800 heating degree-days. Assuming that heating and cooling systems in both places are equally efficient and weighting each cooling degree-day by twice as much as a heating degree-day, climate control in Phoenix uses about 50% more energy than it does in New York. 

It'd be interesting to do this analysis more carefully and see whether it still holds up. But I think the main message here is that it's hard to know in advance what will be friendlier to the environment, so we're probably better off setting a carbon price and letting the market sort it out for us.

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Edited by gmusser at 06/16/2008 8:25 AM

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Edited by gmusser at 06/16/2008 8:28 AM

Does the world really need another science prize?

Today the Kavli Foundation handed out a trio of Nobel-like prizes in the disciplines of astrophysics, nanotechnology, and neuroscience, as my colleague Nikhil Swaminathan described earlier today. I have just one little question: Why? What purpose is possibly served by these awards?

No disrespect to the winners (who are eminently worthy) or the Kavli Foundation (a great friend of basic science), but if had to list the things that science needs right now, hanging more medals around the same necks would be pretty much near the bottom of the list. The two recipients of the astrophysics Kavli have already won the field's greatest accolades, such as the Bruce Medal, Royal Astronomical Society Gold Medal, and Russell Lectureship. I bet they'd be the first to admit they don't need another.

These awards, however well deserved or intentioned, represent a winner-take-all system that is toxic to science. Most researchers bend over backwards to acknowledge how their work depends on the contributions of so many other people. But awards focus attention on a few individuals – and they tend to be the same individuals, over and over again. These individuals gets into a virtuous cycle of award-collecting and grant-getting, while others, no less deserving, struggle.

I know so many young scientists who have had to seek other careers or struggle in low-paid positions with zero institutional support. At poorly funded institutions such as the City University of New York, faculty members have to buy their own chalk and have trouble getting grants to buy so much as a laptop. At institutions rich and poor alike, faculty members frequently spend more time writing grant proposals than doing research. Is that really an efficient use of foundation or taxpayer money? Do the benefits of competition really justify the crushingly heavy overhead? Many scientists, including a National Academy of Sciences panel in 2005, have worried that the system for funding research puts young scientists at a disadvantage and discourages the risk-taking so essential to pushing back the frontiers. All of us suffer as a result.

Kavli does such a great job with its institutes and endowed faculty positions. Wouldn't it have been great if the foundation had spent its $3 million on, say, endowed postdoc positions, or at least had awarded the prizes to teams rather than individuals? It's hard to avoid the conclusion that awards are more about the awarders than the awardees. By recognizing people whom everyone already recognizes, an award-giver basks in their reflected glory, while doing little to add to the sum of human knowledge.

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