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ISSN 0036-807512 MAY 1995VOLUME 268NUMBER 5212
AMERICANASSOCIATION FORTHEADVANCEMENT OFSCIENCE
NEWS & COMMENT
Dispute Splits Schizophrenia StudyA Glimpse of an Elusive Quarry
O'Leary Takes Swipe at Bureaucracy
U.K. Tries to Set Priorities With theBenefit of Foresight
Russian Arctic Battles Pipeline Leak
Japan: Chiba's Heavy-Ion AcceleratorBattles Cancer and Critics
792793
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795
796
797
RESEARCH NEWSnoMAAueA
New Clue to Prostate Cancer Spread 799
Battle Is Joined Over Gamma Bursts 800
Study Unveils Climate Cooling Caused 802by Pollutant Haze
Researchers Get a Sharper Image r 803of the Human Brain
Keeping the Kilo From Gaining Weight 804
Umbilical Cords: Turning Garbage IntoClinical Gold
New Compounds Make Light of Pests
805
806
POLICY FORUM
The World's Forests: Need for aPolicy AppraisalN. Myers
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PERSPECTIVES--
Neuropeptides, Adenylyl Cyclase, and r 825Memory StorageE. Kandel and T. Abel
r 827A Fixation with FixationG. J. Leigh
ARTICLEFrom Microwave Anisotropies toCosmologyD. Scott, J. Silk, M. White
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DEPARTMENTSTHIS WEEK IN SCIENCE
EDITORIALDegrees of Uncertainty
781
783
LETTERS 785Impetus for NSF Policy: D. N. Langenberg * WhoSurvived the Cretaceous?: D. H. Janzen * Author-ship Criteria: J. P. Kassirer * EPA and Biotechnol-ogy Regulation: L. R. Goldman * Reading Disabil-ity, Attention-Deficit Hyperactivity Disorder, andthe Immune System: R. P. Warren, J. D. Odell,W. L. Warren, R. A. Burger, A. Maciulis, W. W.Daniels, A. R. Torres; L. R. Cardon, S. D. Smith,
D. W. Fulker, W. J. Kimberling, B. F. Pennington,J. C. DeFries * Amorphous Stability and Trehalose:C. Colaco, J. Kampinga, B. Roser * NoncodingDNA, Zipf's Law, and Language: A. K. Konopkaand C. Martindale
SCIENCESCOPE
RANDOM SAMPLES
791
807
BOOK REVIEWS 905The Values of Precision, reviewed by S. Widmalm *Vignettes * Reprints of Books Previously Reviewed
PRODUCTS & MATERIALS 915
wnwm_ vab o arw~Board of Reviewing Editors ..inuwutiwinuuuuminuuinmuusm.&C. Thomas CaskeyDennis W. ChoiJohn M. CoffinF. Fleming CrimPaul J. CrutzenJames E. DahlbergRobert DesimoneBruce F. EldridgePaul T. EnglundRichard G. Fairbanks
Douglas T. FearonHarry A. FozzardKlaus FriedrichTheodore H. GeballeRoger 1. M. GlassStephen P. GoffPeter N. GoodfellowCorey S. GoodmanIra HerskowitzEric F. Johnson
Stephen M. KosslynMichael LaBarberaNicole Le DouarinCharles S. Levings Ill
Alexander LevitzkiHarvey F. LodishRichard LosickReinhard LihrmannDiane MathisAnthony R. Means
Shigetada NakanishiRoger A. NicollStuart L. PimmYeshayau PockerDennis A. PowersRalph S. QuatranoV. RamanathanDouglas C. ReesT. M. RiceDavid C. Rubie
Erkki RuoslahtiGottfried SchatzJozef SchellRonald H. SchwartzTerrence J. SejnowskiEllen SolomonThomas A. SteitzMichael P. StrykerRobert T. N. TjianEmil R. Unanue
Geerat J. VermeijBert VogelsteinArthur WeissZena WerbGeorge M. WhitesidesOwen N. WitteWilliam A. Wulf
SCIENCE * VOL. 268 * 12 MAY 1995
SCIENCE
803 & 889Functional visualization
Frederick W. AltDon L. AndersonMichael AshburnerStephen J. BenkovicDavid E. BloomPiet BorstHenry R. BourneMichael S. BrownJames J. BullKathryn Calame
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aCOVER
This skeleton of a Late Triassic turtle (210 million years along with those from Northern Hemisphere sites sug-ago) from Argentina extends the South American fossil gest that turtles were a taxonomically and ecologicallyrecord of turtles by 60 million years and provides the diverse group by the Late Triassic. The shell is 55basis for a new interpretation of basal turtle relation- centimeters long from front to back. See page 855.ships and the origin of living groups. This new taxon [Photo: G. W. Rougier]
RESEARCH ARTICLEConversion of Xenopus Ectoderm 836into Neurons by NeuroD, a BasicHelix-Loop-Helix Protein
J. E. Lee, S. M. Hollenberg, L. Snider, D. L.Turner, N. Lipnick, H. Weintraub
REPORTS --------Aligned Carbon Nanotube Films: 845Production and Optical and ElectronicPropertiesW. A. de Heer, W. S. Bacsa, A. Chatelain, T.Gerfin, R. Humphrey-Baker, L. Forro, D. Ugarte
Phonons Localized at Step Edges:A Route to Understanding Forces atExtended Surface DefectsL. Niu, D. J. Gaspar, S. J. Sibener
Seismic Evidence for an EarthquakeNucleation PhaseW. L. Ellsworth and G. C. Beroza
847
851
Late Triassic Turtles from South America 855G. W. Rougier, M. S. de la Fuente, A. B. Arcucci
Serpentine Stability to Mantle Depthsand Subduction-Related MagmatismP. Ulmer and V. Trommsdorff
Dinitrogen Cleavage by aThree-Coordinate Molybdenum(III)ComplexC. E. Laplaza and C. C. Cummins
858
F 861
CD1 Recognition by Mouse NK1+ T 863LymphocytesA. Bendelac, 0. Lantz, M. E. Quimby, J. W.Yewdell, J. R. Bennink, R. R. Brutkiewicz
Identification and Characterization of a 866Prostaglandin TransporterN. Kanai, R. Lu, J. A. Satriano, Y. Bao, A. W.Wolkoff, V. L. Schuster
A Neuropeptide Gene Defined by theDrosophila Memory Mutant amnesiacM. B. Feany and W. G. Quinn
0 869
Control of Proton Sensitivity of the 873NMDA Receptor by RNA Splicing andPolyaminesS. F. Traynelis, M. Hartley, S. F. Heinemann
Gene Trap Tagging of PROLIFERA, 877an Essential MCM2-3-5-Like Gene inArabidopsis
P. S. Springer, W. R. McCombie, V. Sundaresan,R. A. Martienssen
Role of the Chaperone Protein Hsp104 in 880Propagation of the Yeast Prion-LikeFactor [psi+]Y. O. Chemoff, S. L. Lindquist, B.-i. Ono,S. G. Inge-Vechtomov, S. W. Liebman
KAI1, a Metastasis Suppressor Gene r 884for Prostate Cancer on HumanChromosome lip1 1.2J.-T. Dong, P. W. Lamb, C. W. Rinker-Schaeffer, J. Vukanovic, T. Ichikawa, J. T.Isaacs, J. C. Barrett
Long-Range Motional Restrictions in aMultidomain Zinc-Finger Protein fromAnisotropic TumblingR. Brfischweiler, X. Liao, P. E. Wright
886
Borders of Multiple Visual Areas in r 889Humans Revealed by Functional MagneticResonance ImagingM. I. Sereno, A. M. Dale, J. B. Reppas, K. K.Kwong, J. W. Belliveau, T. J. Brady, B. R.Rosen, R. B. H. Tootell
TECHNICAL COMMENTS I
Evaluating Turnover in Tropical ForestsD. Sheil; 0. Phillips
894
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SCIENCE * VOL. 268 * 12 MAY 1995
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