Opinion

External assessment pays national dividends p393

A decision to expose Germany's science to international scrutiny has yielded a constructive appraisal. Although such evaluation can have its pitfalls, other countries should follow suit.

doi:10.1038/20741

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Policy on papers' contributors p393

Nature is encouraging authors of papers to say who did what.

doi:10.1038/20743

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News

German research bodies urged to open up more to new ideas p395

Alison Abbott and Quirin Schiermeier

doi:10.1038/20745

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US labs braced for anti-spying legislation p395

Colin Macilwain

doi:10.1038/20749

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Proceed with caution, says UK report on ethics of GM foods p396

David Dickson

doi:10.1038/20751

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US Senate gets tough on animal activists p397

Meredith Wadman

doi:10.1038/20753

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San Francisco scientists hit by growing protests p397

Meredith Wadman

doi:10.1038/20756

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'Frontiers' grants count cost of success p398

Alison Abbott and Asako Saegusa

doi:10.1038/20758

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Californian grad students vote to unionize p399

Rex Dalton

doi:10.1038/20762

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Reprieve for neutron project in Congress p399

Colin Macilwain

doi:10.1038/20765

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Spanish council quizzed on recruits ... p400

Xavier Bosch

doi:10.1038/20767

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... as physicist's complaints hit their mark p400

Xavier Bosch

doi:10.1038/20770

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News Profile

Canadian institute seeks to secure its financial future p401

The Canadian Institute for Advanced Research promotes excellence in research. But as a funding agreement with the government is set to expire, it must secure a firm financial base if this success is to continue.

Colin Macilwain

doi:10.1038/20772

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News in Brief p402

doi:10.1038/20775

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News

Internet gateway is planned to help women in science p404

doi:10.1038/20777

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Why the South needs the North to help set up research networks p404

doi:10.1038/20779

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Science partnerships 'must be of benefit to all sides' p404

doi:10.1038/20782

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Correspondence

Cautionary tale on safety of GM crops p405

John E. Beringer

doi:10.1038/20784

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Plant DNA patents in the hands of a few p405

S. M. Thomas, M. Brady and J. F. Burke

doi:10.1038/20786

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Papers should spell out authors' roles p406

A. Zyzik and T. Goldmann

doi:10.1038/20789

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Scientists must bridge the communication gap p406

Nick Battey and Pablo Jensen

doi:10.1038/20792

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News and Views

Deer destiny determined by density p407

Andrew Cockburn

doi:10.1038/20794

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Display technology:  Glowing developments p408

Karl Ziemelis

doi:10.1038/20798

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100 and 50 years ago p409

doi:10.1038/20802

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Apoptosis:  Key to the mitochondrial gate p411

Jean-Claude Martinou

doi:10.1038/20804

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Climate change:  Cornucopia of ice core results p412

Bernhard Stauffer

doi:10.1038/20807

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Retroviruses:  Closing the joint p413

John M. Coffin and Naomi Rosenberg

doi:10.1038/20810

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Parasitology:  Chaperonin camouflage p415

Mark Gibbs

doi:10.1038/20813

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Solar physics:  Sunny side of global warming p416

E. N. Parker

doi:10.1038/20816

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Quantum enzymology:  Tunnel vision p417

Dagmar Ringe and Gregory A. Petsko

doi:10.1038/20819

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Evolutionary neurobiology:  The neocortex comes together p418

Jon H. Kaas and Anton Reiner

doi:10.1038/20821

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Daedalus:  Play it again, Sam p419

David Jones

doi:10.1038/20824

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Obituary:  Arthur Schawlow (1921-99) p420

Charles H. Townes

doi:10.1038/20826

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Scientific Correspondence

Orchid pollination by sexual swindle p421

Florian P. Schiestl, Manfred Ayasse, Hannes F. Paulus, Christer Löfstedt, Bill S. Hansson, Fernando Ibarra and Wittko Francke

doi:10.1038/20829

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Fractal analysis of Pollock's drip paintings p422

Richard P. Taylor, Adam P. Micolich and David Jonas

doi:10.1038/20833

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Release from inhibition reveals the visual past p422

T. R. Vidyasagar, P. Buzás, Z. F. Kisvárday and U. T. Eysel

doi:10.1038/20836

First paragraph | Full Text | PDF (305K) | Supplementary information

Climate change related to egg-laying trends p423

Humphrey Q. P. Crick and Timothy H. Sparks

doi:10.1038/20839

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Book Reviews

Captain, art thou sleeping there below? p425

Alan Longhurst

doi:10.1038/20842

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In shallower waters p425

doi:10.1038/20844

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Firing up the power plant in our heads p426

Bob Martin

doi:10.1038/20847

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The feelgood factor p427

John Galloway

doi:10.1038/20849

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Correction: Forced Smile p427

doi:10.1038/20852

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Correction: From entropy to Duino Pavia p427

doi:10.1038/20854

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Science in culture p428

Martin Kemp

doi:10.1038/20856

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Article

Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica p429

J. R. Petit, J. Jouzel, D. Raynaud, N. I. Barkov, J.-M. Barnola, I. Basile, M. Bender, J. Chappellaz, M. Davis, G. Delaygue, M. Delmotte, V. M. Kotlyakov, M. Legrand, V. Y. Lipenkov, C. Lorius, L. PÉpin, C. Ritz, E. Saltzman and M. Stievenard

doi:10.1038/20859

Abstract | Full Text | PDF (399K) | Supplementary information

Letters to Nature

A doubling of the Sun's coronal magnetic field during the past 100 years p437

M. Lockwood, R. Stamper and M. N. Wild

doi:10.1038/20867

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Origin of high critical currents in YBa₂Cu₃O_7- superconducting thin films p439

B. Dam, J. M. Huijbregtse, F. C. Klaassen, R. C. F. van der Geest, G. Doornbos, J. H. Rector, A. M. Testa, S. Freisem, J. C. Martinez, B. Stäuble-Pümpin and R. Griessen

doi:10.1038/20880

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Recovery of surfaces from impurity poisoning during crystal growth p442

Terry A. Land, Tracie L. Martin, Sergey Potapenko, G. Tayhas Palmore and James J. De Yoreo

doi:10.1038/20886

First paragraph | Full Text | PDF (367K)

Tying a molecular knot with optical tweezers p446

Yasuharu Arai, Ryohei Yasuda, Ken-ichirou Akashi, Yoshie Harada, Hidetake Miyata, Kazuhiko Kinosita, Jr and Hiroyasu Itoh

doi:10.1038/20894

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Memory of macromolecular helicity assisted by interaction with achiral small molecules p449

Eiji Yashima, Katsuhiro Maeda and Yoshio Okamoto

doi:10.1038/20900

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Simulation of recent northern winter climate trends by greenhouse-gas forcing p452

Drew T. Shindell, Ron L. Miller, Gavin A. Schmidt and Lionel Pandolfo

doi:10.1038/20905

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Diamonds in volcaniclastic komatiite from French Guiana p456

Ramon Capdevila, Nicholas Arndt, Jacques Letendre and Jean-FranÇois Sauvage

doi:10.1038/20911

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Population density affects sex ratio variation in red deer p459

Loeske E. B. Kruuk, Tim H. Clutton-Brock, Steve D. Albon, Josephine M. Pemberton and Fiona E. Guinness

doi:10.1038/20917

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Multifractality in human heartbeat dynamics p461

Plamen Ch. Ivanov, Luís A. Nunes Amaral, Ary L. Goldberger, Shlomo Havlin, Michael G. Rosenblum, Zbigniew R. Struzik and H. Eugene Stanley

doi:10.1038/20924

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Decrystallization of adult birdsong by perturbation of auditory feedback p466

Anthony Leonardo and Masakazu Konishi

doi:10.1038/20933

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Neuronal correlates of parametric working memory in the prefrontal cortex p470

Ranulfo Romo, Carlos D. Brody, Adrián Hernández and Luis Lemus

doi:10.1038/20939

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Developmental basis of limblessness and axial patterning in snakes p474

Martin J .Cohn and Cheryll Tickle

doi:10.1038/20944

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The MAPK kinase Pek1 acts as a phosphorylation-dependent molecular switch p479

Reiko Sugiura, Takashi Toda, Susheela Dhut, Hisato Shuntoh, Takayoshi Kuno and Takayoshi Kuno

doi:10.1038/20951

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Bcl-2 family proteins regulate the release of apoptogenic cytochrome c by the mitochondrial channel VDAC p483

Shigeomi Shimizu, Masashi Narita, Yoshihide Tsujimoto and Yoshihide Tsujimoto

doi:10.1038/20959

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Interaction of E1 and hSNF5 proteins stimulates replication of human papillomavirus DNA p487

Daeyoup Lee, Hekwang Sohn, Ganjam V. Kalpana, Joonho Choe and Joonho Choe

doi:10.1038/20966

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Structure and ligand of a histone acetyltransferase bromodomain p491

Christophe Dhalluin, Justin E. Carlson, Lei Zeng, Cheng He, Aneel K. Aggarwal, Ming-Ming Zhou and Ming-Ming Zhou

doi:10.1038/20974

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Enzyme dynamics and hydrogen tunnelling in a thermophilic alcohol dehydrogenase p496

Amnon Kohen, Raffaele Cannio, Simonetta Bartolucci, Judith P. Klinman and Judith P. Klinman

doi:10.1038/20981

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New on the Market

Of mice and mice p501

Two kits making it easier to see staining with mouse antibodies against a background of mouse tissue, and ELISA assays for insulin and FK506 in an immunologically inclined selection.
Compiled in the Nature office from information provided by the manufacturers.

doi:10.1038/20990

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