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ISSN 0036-80755 JUNE 1992VOLUME 256NUMBER 5062
AMERICANASSOCIATION FOR THEADVANCEMENT OFSCIENCE
1 3969 1 402, =%1416 & 1420RNA makes peptlde bonds
and that s not all
NEWS & COMMENTFuror at Lyme Disease ConferenceCalifornia Rides Its Own Bi-Cycle
Mission Impossible: Saving AllEndangered Species
Errant HIV Strain Renders Test VirusStock Useless
r 1384
1386
1387
NASA Researchers Protest DOE Turnoff 1388
Panel Clears Needleman of Misconduct 1389
Institute of Medicine Elects New Members 1389
WS........
Scoring a Technical Knockout in Mice r 1392Researchers Wrestle With Concerns OverCost and Access
Did an Asteroid Leave Its Mark in 1395Montana Bones?
Finding RNA Makes Proteins Gives 1396'RNA World' a Big Boost
Gammas From Heaven 1397
1 392 Knockoutmice find
& favor with
1 448 biologists
PERSPECTIVESNew Horizons for RNA CatalysisN. R. Pace
On the Other Hand ...G. A. Petsko
r 1402
F 1403
ARTICLESCrust Formation and Plate Motion in theEarly ArcheanA. Kroner and P. W. Layer
Human Organ Transplantation:Background and Consequences
J. E. Murray
1405
1411
DEPARTMENTSTHIS WEEK IN SCIENCE
EDITORIALEconomic Impact Report
1371
1373
LETTERS 1378The Smithsonian and Sheep Hunting: R. S.Hoffmann; E. Marshall * European Science:H. W. Mewes, S. Oliver, A. Goffeau; A. Anderson;A. A. Travers, A. Anderson * NIH Leaks:J. Schneider * Fear of Butterflies: A. M. Shapiro -Math Teaching, K-12: Relevant Expertise:S. Mac Lane
SCIENCESCOPE 1383Needles shoot down ADAMHA reorganization, etc.
RANDOM SAMPLES 1390An OTA for Parliament * Parkinson's ProgresseBirth Control for Animals, etc.
BOOK REVIEWS 1464A Space for Science, reviewed by D. Serwer * SomeOther Books of Interest * Vignettes: Popular Images* Books Received
PRODUCTS & MATERIALS 1467
.AAAS Board of Directors- .:Board of Reviewing Editors.
Leon M. LedermanRetiring President,Chairman
F. Sherwood RowlandPresident
Eloise E. ClarkPresident-elect
Mary Ellen AveryFrancisco J. AyalaRobert A. Frosch
Florence P. HaseltineAlan SchriesheimJean'ne M. ShreeveChang-Lin TienWarren M. Washington
William T. GoldenTreasurer
Richard S. NicholsonExecutive Officer
John AbelsonFrederick W. AltDon L. AndersonStephen J. BenkovicDavid E. BloomFloyd E. BloomHenry R. BourneJames J. BullKathryn CalameC. Thomas CaskeyDennis W. Choi
John M. CoffinBruce F. EldridgePaul T. EnglundRichard G. FairbanksDouglas T. FearonHarry A. FozzardVictor R. FuchsTheodore H. GeballeMargaret J. GellerJohn C. GerhartRoger 1. M. Glass
Stephen P. GoffCorey S. GoodmanStephen J. GouldIra HerskowitzEric F. JohnsonStephen M. KosslynMichael LaBarberaCharles S. Levings IllHarvey F. LodishRichard LosickAnthony R. Means
Mortimer MishkinRoger A. NicollWilliam H. Orme-Johnson IllStuart L. PimmYeshayau PockerDennis A. PowersRalph S. QuatranoV. RamanathanErkki RuoslahtiRonald H. SchwartzTerrence J. Sejnowski
Thomas A. SteitzRichard F. ThompsonRobert T. N. TjianEmil R. UnanueGeerat J. VermeijBert VogelsteinHarold WeintraubZena WerbGeorge M. WhitesidesOwen N. WitteKeith Yamamoto
SCIENCE * VOL. 256 * 5 JUNE 1992
ScIENCE
1368