Nature contents: 21 June 2012

Can't view this email? Click here to view in your browser.     Volume 486 Number 7403      nature •Visit Nature homepage •Subscribe to Nature •View Table of Contents The science that matters. Every week.                       AIMResearch - Highlighting the latest research from the WPI Advanced Institute for Materials Research, Tohoku University, Japan Latest highlights: Topological insulators: Conduction gets a tune-up | Bulk metallic glasses: An unexpected hybrid | Polymer properties: Macromolecular mapmaking. In the spotlight: A new director, a new direction (interview). Register today for monthly email alerts and never miss the latest in materials research from the WPI-AIMR!             Jump to the content that matters to you View Table of Contents ▶ ▼ News & Comment   ▼ Biological Sciences   ▼ Chemical Sciences   ▼ Physical Sciences   ▼ Earth & Environmental Sciences   ▼ Careers & Jobs       This week's highlights     Specials - Outlook: Taste     Taste is central to our being, but this vital sense is only now becoming clear at the biological level. Scientists have identified the receptors that respond to the five basic stimuli of sweet, sour, bitter, salty and umami (savoury), and are now exploring how the brain interprets them. Nature Outlook Taste reports the latest findings from the front lines of flavour. ▼ more       Biological Sciences More Biological sciences ▼   Engineering H5N1 avian influenza viruses to study human adaptation   This Perspective article discusses concerns that were raised about making the data from two papers describing the production of ferret-transmissible H5N1 influenza viruses — one was submitted to Nature and one to Science. The authors conclude that when considering the threat of bioterrorism or accidental release of genetically engineered viruses, nature is the ultimate bioterrorist. To prepare for the possibility of future devastating influenza pandemics, the critical importance of advancing scientific knowledge needs to be kept as the main priority.       Physical Sciences More Physical sciences ▼   Multiscale gigapixel photography   A 'supercamera' that can take gigapixel-sized images is described in Nature this week. It measures 75 by 75 by 50 cm, a size dictated by the need to effectively cool the electronic control boards. The authors are hopeful that as the electronics are developed, the age of hand-held gigapixel photography may follow and with it the emphasis in digital photography will switch from image capture to post-capture analysis and data-mining.                   Roche's X-tremeGENE Transfection Reagents Transfect efficiently with low cytotoxicity - proven in 250 different cell types...over 100 cancer cells. Free sample and protocols at http://www.x-tremegene.roche.com For life science research only. Not for use in diagnostic procedures.                 Earth & Environmental Sciences More Earth & Environmental sciences ▼   First dairying in green Saharan Africa in the fifth millennium BC   Rock-art scenes depicting domesticated cattle are common in the mountains of Libyan Sahara, suggesting that cattle played a big part in the lives of ancient humans. Rock art is notoriously difficult to date, but now isotope analysis of absorbed food residues in pottery excavated from the Takarkori rock shelter in the Libyan Sahara provides the first unequivocal chemical evidence of dairying in the archaeological record, in prehistoric Africa in the fifth millennium BC.       Podcast & Video     In this week's podcast: some very early dairy farming, a gigapixel camera, a quiet place for theoretical physicists and a crack at the Turing test.         News & Comment Read daily news coverage▶ ▲top             THIS WEEK           Editorials                   Time to open up ▶     If scientists want the public to continue to volunteer for research projects, they must learn to be a lot more forthcoming about the ways in which the information they garner will be used.             Renewed vigour ▶     Stem-cell researchers must engage with politicians to keep their work alive in Europe.             Serious questions ▶     Nature Publishing Group's reader survey on lab-safety practices needs your input.             World View                   Do not censor science in the name of biosecurity ▶     Security officials should not be concerned about the publication of mutant-flu research, says bio-weapons expert Tim Trevan.             Seven Days                   Seven days: 15–21 June 2012 ▶     The week in science: US reclaims world's top supercomputer; Australia unveils plans for largest marine reserves; and China celebrates another space programme success.           NEWS IN FOCUS           Nobel fight over African HIV centre ▶     Laureates question choice of interim scientific director.             Britain aims for broad open access ▶     But critics claim plan seeks to protect publishers' interests.             A workforce out of balance ▶     Too many biomedical PhDs and too few minorities are a demographic dilemma for the NIH.             Romanian prime minister accused of plagiarism ▶     Allegations prompt questions about government's ability to tackle misconduct in academia.             Peru battles the golden curse of Madre de Dios ▶     Attempts to reduce the environmental and health impacts of mining cause unrest.             Cuts leave Greek heritage in ruins ▶     Austerity measures damaging archaeological research.             Features                   The trouble with turbines: An ill wind ▶     With turbines threatening some bird and bat populations, researchers are seeking ways to keep the skies safe for wildlife.             Informed consent: A broken contract ▶     As researchers find more uses for data, informed consent has become a source of confusion. Something has to change.           COMMENT           History: Aspen physics turns 50 ▶     Michael S. Turner reflects on how mountain serenity has bred big breakthroughs at the Aspen Center for Physics in Colorado.             Books and Arts                   Nobel Prize: A dark edge to the glory ▶     An examination of the battles behind the prestige of top awards grips Hidde Ploegh.             Books in brief ▶             Animal behaviour: Dissecting decay ▶     Clive D. L. Wynne celebrates a lively exploration of the life-and-death cycle in the wild.             Mathematics: A life computed ▶     James Poskett navigates a sophisticated account of Alan Turing's extraordinarily varied intellectual world.             Correspondence                   Climate: More ways to govern geoengineering Jane C. S. Long, Steve Hamburg & John Shepherd | Nuclear waste: Use fast reactors to burn plutonium Barry W. Brook, Tom Blees & William H. Hannum | Drug discovery: Spread the risk of antibiotic research Chris Schofield | Cetaceans: Monitor sea pollution to stop strandings Juan Jose Alava | AIDS: China must provide education on HIV Jian Zhang & Nan Jiang           Obituary                   Akira Tonomura (1942–2012) ▶     Physicist who pioneered electron holography.             Corrections                   Correction ▶             Correction ▶                         Emerging Microbes & Infections (EMI) - New open access journal launching in July 2012! EMI aims to provide a forum to publish articles related to all aspects of emerging pathogens, such as their previously unknown genotypic or phenotypic characteristics, their mechanisms of pathogenesis and evasion of immunity, and the diseases they cause. Submit today!               Biological Sciences ▲top             RESEARCH           Latest Online                   Neuroscience: Genes and human brain evolution ▶     Daniel H. Geschwind & Genevieve Konopka             Novel mutations target distinct subgroups of medulloblastoma ▶     Giles Robinson, Matthew Parker, Tanya A. Kranenburg, Charles Lu, Xiang Chen et al.     Whole-genome sequencing of medulloblastoma samples reveals several recurrent mutations in genes not previously implicated in the disease, many of which affect components of the epigenetic machinery in different disease subgroups.             Reconciling the temperature dependence of respiration across timescales and ecosystem types ▶     Gabriel Yvon-Durocher, Jane M. Caffrey, Alessandro Cescatti, Matteo Dossena, Paul del Giorgio et al.     The sensitivity of ecosystem respiration to seasonal changes in temperature is shown to be remarkably similar for a wide range of ecosystem types spanning the globe; however, terrestrial and aquatic ecosystems differ markedly in their temperature sensitivity over annual timescales.             Disentangling nestedness from models of ecological complexity ▶     Alex James, Jonathan W. Pitchford & Michael J. Plank     Examination of previous results and computational analysis of empirical data sets representing mutualistic plant–pollinator networks shows that a simple metric—the number of mutualistic partners a species has—is a better predictor of individual species survival (and hence, community persistence) than is the nestedness of ecological networks.             Rsx is a metatherian RNA with Xist-like properties in X-chromosome inactivation ▶     Jennifer Grant, Shantha K. Mahadevaiah, Pavel Khil, Mahesh N. Sangrithi, Hélène Royo et al.     A non-coding RNA termed Rsx, which has properties consistent with a role in X-chromosome inactivation, is identified in the marsupial Monodelphis domestica.             Heterogeneous pathways and timing of factor departure during translation initiation ▶     Albert Tsai, Alexey Petrov, R. Andrew Marshall, Jonas Korlach, Sotaro Uemura et al.     A single-molecule approach is used to investigate the kinetics of assembly of the translation initiation complex, revealing that there is more than one pathway by which the necessary factors can assemble.             Genetic dissection of the circuit for hand dexterity in primates ▶     Masaharu Kinoshita, Ryosuke Matsui, Shigeki Kato, Taku Hasegawa, Hironori Kasahara et al.     A new double-infection technique with viral vectors is used to interrupt transmission through the propriospinal neurons (PNs) in macaque monkeys, and this is found to impair reach and grasp movements, revealing a critical role for the PN-mediated pathway in the control of hand dexterity.             Articles and Letters                   The genomic and transcriptomic architecture of 2,000 breast tumours reveals novel subgroups ▶     Christina Curtis, Sohrab P. Shah, Suet-Feung Chin, Gulisa Turashvili, Oscar M. Rueda et al.     Integrative analysis of copy number and gene expression in 2,000 primary breast tumours with long-term clinical follow-up revealed putative cis-acting driver genes, novel subgroups and trans-acting aberration hotspots that modulate subgroup-specific gene networks.             Whole-genome analysis informs breast cancer response to aromatase inhibition ▶     Matthew J. Ellis, Li Ding, Dong Shen, Jingqin Luo, Vera J. Suman et al.     Whole-genome analysis of oestrogen-receptor-positive tumours in patients treated with aromatase inhibitors show that distinct phenotypes are associated with specific patterns of somatic mutations; however, most recurrent mutations are relatively infrequent so prospective clinical trials will require comprehensive sequencing and large study populations.             Large-scale prediction and testing of drug activity on side-effect targets ▶     Eugen Lounkine, Michael J. Keiser, Steven Whitebread, Dmitri Mikhailov, Jacques Hamon et al.     A large-scale computational effort is used to predict the activity of 656 drugs against 73 protein targets that have been associated with adverse drug reactions; the abdominal pain side effect of the synthetic oestrogen chlorotrianisene is shown to be mediated through its inhibition of cyclooxygenase-1.             Structure of yeast Argonaute with guide RNA ▶     Kotaro Nakanishi, David E. Weinberg, David P. Bartel & Dinshaw J. Patel     Argonaute proteins are an essential part of the guide-RNA–protein complex that carries out RNA-induced gene silencing; structure–function studies of the yeast complex reveal conserved features of the eukaryotic complex, which underlie formation of the catalytically active conformation.             First dairying in green Saharan Africa in the fifth millennium bc  ▶     Julie Dunne, Richard P. Evershed, Mélanie Salque, Lucy Cramp, Silvia Bruni et al.     Lipid biomarker and stable carbon isotope analysis of absorbed food residues in prehistoric pottery from the Libyan Sahara has identified the first adoption of dairying practices in Neolithic Africa in the fifth millennium bc.             The clonal and mutational evolution spectrum of primary triple-negative breast cancers ▶     Sohrab P. Shah, Andrew Roth, Rodrigo Goya, Arusha Oloumi, Gavin Ha et al.     Primary triple-negative breast cancers are shown to vary widely and continuously in the degree of clonal evolution and mutational content at the time of diagnosis, with implications for future studies of the disease.             The landscape of cancer genes and mutational processes in breast cancer ▶     Philip J. Stephens, Patrick S. Tarpey, Helen Davies, Peter Van Loo, Chris Greenman et al.     A study of breast cancers shows that the number of somatic mutations in each varies markedly and is strongly correlated with age at diagnosis and cancer histological grade.             Sequence analysis of mutations and translocations across breast cancer subtypes ▶     Shantanu Banerji, Kristian Cibulskis, Claudia Rangel-Escareno, Kristin K. Brown, Scott L. Carter et al.     This paper reports one of the largest breast cancer whole-exome and whole-genome sequencing efforts so far, identifying previously unknown recurrent mutations in CBFB, deletions of RUNX1 and recurrent MAGI1–AKT3 fusion; the fusion suggests that the use of ATP-competitive AKT inhibitors should be evaluated in clinical trials.             Astrocyte glypicans 4 and 6 promote formation of excitatory synapses via GluA1 AMPA receptors ▶     Nicola J. Allen, Mariko L. Bennett, Lynette C. Foo, Gordon X. Wang, Chandrani Chakraborty et al.     Glypican 4 and glypican 6 are identified as astrocyte-secreted signals that induce the formation of functional, rather than structural, synapses through the recruitment to the neuron surface of the GluA1 subunits of the AMPA glutamate receptor.             PGC7 binds histone H3K9me2 to protect against conversion of 5mC to 5hmC in early embryos ▶     Toshinobu Nakamura, Yu-Jung Liu, Hiroyuki Nakashima, Hiroki Umehara, Kimiko Inoue et al.     The binding of PGC7 to maternal chromatin, which is important for methylation maintenance during embryogenesis, is shown to be dependent on a particular histone modification, H3K9me2.             Experimental adaptation of an influenza H5 HA confers respiratory droplet transmission to a reassortant H5 HA/H1N1 virus in ferrets ▶     Masaki Imai, Tokiko Watanabe, Masato Hatta, Subash C. Das, Makoto Ozawa et al.     Only four mutations in H5N1 HA are required to enable ferret-to-ferret transmission of a reassortant virus containing the H5 HA and the remaining seven gene segments from a human pandemic H1N1 influenza virus.             Reviews and Perspectives                   Engineering H5N1 avian influenza viruses to study human adaptation ▶     David M. Morens, Kanta Subbarao & Jeffery K. Taubenberger     Engineering influenza viruses to study human adaptation is a controversial area of research, with opinions diverging over the wisdom of publishing the full results of such studies.             News & Views                   Drug discovery: Computer model predicts side effects ▶     Kyle Kolaja             Genomics: The breast cancer landscape ▶     Joe Gray & Brian Druker             Virology: Bird flu in mammals ▶     Hui-Ling Yen & Joseph Sriyal Malik Peiris             Neuroscience: Genes and human brain evolution ▶     Daniel H. Geschwind & Genevieve Konopka             Research Highlights                   Ecology: Bat culls do not stop spread of rabies | Infectious Disease: Sequencing tracks outbreak | Animal behaviour: Castration boosts spider stamina | Immunology: Good microbes fight bad | Microbiology: Bacterial border defence | Stem cells: Human eye parts in a dish | Archaeology: One mummy but three people         NEWS & COMMENT           Time to open up | Renewed vigour | Do not censor science in the name of biosecurity | Nobel fight over African HIV centre | Cuts leave Greek heritage in ruins | The trouble with turbines: An ill wind | Informed consent: A broken contract | Nobel Prize: A dark edge to the glory | Books in brief | Animal behaviour: Dissecting decay | Drug discovery: Spread the risk of antibiotic research Chris Schofield | AIDS: China must provide education on HIV Jian Zhang & Nan Jiang             More Biological Sciences ▶                         Lindau Nobel Community The Interactive home of the Lindau Meetings The 62nd Lindau Meeting of Nobel Laureates is dedicated to physics. We invite you to visit the Lindau Nobel Community site to access multilingual blogs, follow tweets about the event and view pictures from Instagram. You can watch footage by Nature Video from past and present meetings and more. Access the site online.               Chemical Sciences ▲top             RESEARCH           Latest Online                   Heterogeneous pathways and timing of factor departure during translation initiation ▶     Albert Tsai, Alexey Petrov, R. Andrew Marshall, Jonas Korlach, Sotaro Uemura et al.     A single-molecule approach is used to investigate the kinetics of assembly of the translation initiation complex, revealing that there is more than one pathway by which the necessary factors can assemble.             Articles and Letters                   Large-scale prediction and testing of drug activity on side-effect targets ▶     Eugen Lounkine, Michael J. Keiser, Steven Whitebread, Dmitri Mikhailov, Jacques Hamon et al.     A large-scale computational effort is used to predict the activity of 656 drugs against 73 protein targets that have been associated with adverse drug reactions; the abdominal pain side effect of the synthetic oestrogen chlorotrianisene is shown to be mediated through its inhibition of cyclooxygenase-1.             Structure of yeast Argonaute with guide RNA ▶     Kotaro Nakanishi, David E. Weinberg, David P. Bartel & Dinshaw J. Patel     Argonaute proteins are an essential part of the guide-RNA–protein complex that carries out RNA-induced gene silencing; structure–function studies of the yeast complex reveal conserved features of the eukaryotic complex, which underlie formation of the catalytically active conformation.             News & Views                   Drug discovery: Computer model predicts side effects ▶     Kyle Kolaja             Materials chemistry: Carbon origami ▶     Jay S. Siegel             Research Highlights                   Materials: Graphene can desalinate water | Microbiology: Bacterial border defence         NEWS & COMMENT           Nobel Prize: A dark edge to the glory             More Chemical Sciences ▶               Physical Sciences ▲top             RESEARCH           Latest Online                   The signature of the first stars in atomic hydrogen at redshift 20 ▶     Eli Visbal, Rennan Barkana, Anastasia Fialkov, Dmitriy Tseliakhovich & Christopher M. Hirata     A simulation of the distribution of the first stars at a cosmic age of about 180 million years reveals that the 21-cm atomic hydrogen signature of these stars is an enhanced (ten millikelvin) fluctuation signal on scales of a few hundred million light-years.             Gate-tuning of graphene plasmons revealed by infrared nano-imaging ▶     Z. Fei, A. S. Rodin, G. O. Andreev, W. Bao, A. S. McLeod et al.     Plasmons are directly launched in graphene, and their key parameters — propagation and attenuation — are studied with near-field infrared nano-imaging.             Optical nano-imaging of gate-tunable graphene plasmons ▶     Jianing Chen, Michela Badioli, Pablo Alonso-González, Sukosin Thongrattanasiri, Florian Huth et al.     Propagating optical plasmons — collective electron excitations coupled to photons — are launched in graphene and studied with near-field optical microscopy, revealing ultra-strong optical field confinement and gate-tunable control of optical fields at nanoscale dimensions.             Articles and Letters                   Superallowed Gamow–Teller decay of the doubly magic nucleus 100Sn ▶     C. B. Hinke, M. Böhmer, P. Boutachkov, T. Faestermann, H. Geissel et al.     Measurements of the half-life and decay energy of the β-decay of 100Sn show that Gamow–Teller transitions of this nucleus have the greatest strength found so far and are ‘superallowed’.             An abundance of small exoplanets around stars with a wide range of metallicities ▶     Lars A. Buchhave, David W. Latham, Anders Johansen, Martin Bizzarro, Guillermo Torres et al.     Whereas large planets, such as gas giants, are more likely to form around high-metallicity stars, terrestrial-sized planets are found to form around stars with a wide range of metallicities, indicating that they may be widespread in the disk of the Galaxy.             Constraints on the volatile distribution within Shackleton crater at the lunar south pole ▶     Maria T. Zuber, James W. Head, David E. Smith, Gregory A. Neumann, Erwan Mazarico et al.     Observations from the Lunar Orbiter Laser Altimeter reveal the Moon’s Shackleton crater to be an ancient, unusually well-preserved simple crater whose interior walls are younger than its floor and rim; the relative brightness of the floor at 1,064 nanometres is most readily explained by minimal volatile accumulation since crater formation and decreased space weathering due to permanent shadow.             Electronic nematicity above the structural and superconducting transition in BaFe2(As1−xPx)2  ▶     S. Kasahara, H. J. Shi, K. Hashimoto, S. Tonegawa, Y. Mizukami et al.     Electronic nematicity, a unidirectional self-organized state that breaks the rotational symmetry of the underlying lattice, has been observed in an iron-based superconductor, BaFe2(As1−xPx)2, over a wide range of phosphorus concentration, resulting in a phase diagram similar to the pseudogap phase diagram of the copper oxides.             Multiscale gigapixel photography ▶     D. J. Brady, M. E. Gehm, R. A. Stack, D. L. Marks, D. S. Kittle et al.     The AWARE-2 camera uses a parallel array of microcameras to capture one-gigapixel images at three frames per minute.             News & Views                   Nuclear physics: Symmetrical tin ▶     Daniel Bazin             Planetary science: Early start for rocky planets ▶     Debra Fischer             Brief Communications Arising                   The Great Eruption of η Carinae ▶     Kris Davidson & Roberta M. Humphreys             Rest et al. reply ▶     A. Rest, J. L. Prieto, N. R. Walborn, N. Smith, F. B. Bianco et al.             Research Highlights                   Applied physics: Terahertz-wave detector | Climate change: Melting ice behind arctic warming         NEWS & COMMENT           History: Aspen physics turns 50 | Books in brief | Mathematics: A life computed | Climate: More ways to govern geoengineering Jane C. S. Long, Steve Hamburg & John Shepherd | Nuclear waste: Use fast reactors to burn plutonium Barry W. Brook, Tom Blees & William H. Hannum | Akira Tonomura (1942–2012)             More Physical Sciences ▶               Earth & Environmental Sciences ▲top             RESEARCH           Latest Online                   Reconciling the temperature dependence of respiration across timescales and ecosystem types ▶     Gabriel Yvon-Durocher, Jane M. Caffrey, Alessandro Cescatti, Matteo Dossena, Paul del Giorgio et al.     The sensitivity of ecosystem respiration to seasonal changes in temperature is shown to be remarkably similar for a wide range of ecosystem types spanning the globe; however, terrestrial and aquatic ecosystems differ markedly in their temperature sensitivity over annual timescales.             Articles and Letters                   An abundance of small exoplanets around stars with a wide range of metallicities ▶     Lars A. Buchhave, David W. Latham, Anders Johansen, Martin Bizzarro, Guillermo Torres et al.     Whereas large planets, such as gas giants, are more likely to form around high-metallicity stars, terrestrial-sized planets are found to form around stars with a wide range of metallicities, indicating that they may be widespread in the disk of the Galaxy.             Constraints on the volatile distribution within Shackleton crater at the lunar south pole ▶     Maria T. Zuber, James W. Head, David E. Smith, Gregory A. Neumann, Erwan Mazarico et al.     Observations from the Lunar Orbiter Laser Altimeter reveal the Moon’s Shackleton crater to be an ancient, unusually well-preserved simple crater whose interior walls are younger than its floor and rim; the relative brightness of the floor at 1,064 nanometres is most readily explained by minimal volatile accumulation since crater formation and decreased space weathering due to permanent shadow.             News & Views                   Planetary science: Early start for rocky planets ▶     Debra Fischer             Research Highlights                   Climate change: Melting ice behind arctic warming         NEWS & COMMENT           Peru battles the golden curse of Madre de Dios | The trouble with turbines: An ill wind | Animal behaviour: Dissecting decay | Climate: More ways to govern geoengineering Jane C. S. Long, Steve Hamburg & John Shepherd | Cetaceans: Monitor sea pollution to stop strandings Juan Jose Alava             More Earth & Environmental Sciences ▶               Special - Nature Outlook: TasteFree Access ▲top               Editorial: Taste ▶     Herb Brody              Gustatory system: The finer points of taste ▶     As more receptors are defined, researchers will further unlock the mechanics of taste. How the mind perceives these sensory signals is another matter.              Sensory science: Partners in flavour ▶     Our perception of food draws on a combination of taste, smell, feel, sight and sound.              Perspective: Complexities of flavour ▶     Is flavour an intrinsic objective property, or a subjective experience that varies from person to person? Barry Smith sorts out the implications.              Neuroscience: Hardwired for taste ▶     Research into human taste receptors extends beyond the tongue to some unexpected places.              Cooking: Delicious science ▶     Chefs are teaming up with researchers to create avant-garde dishes. Is 'molecular gastronomy' more than a fad?              Obesity: Insensitive issue ▶     It is becoming clear that links between taste preferences and obesity go beyond simply having a sweet tooth.              Food science: Taste bud hackers ▶     Scientists and psychologists are trying to trick our mouths and minds into enjoying foods that are better for us.              Evolutionary biology: The lost appetites ▶     Many vertebrates can detect the same five basic tastes that humans can, but there are exceptions. Are the differences caused by a change in diet?              Technology: The taste of things to come ▶     Artificial tongues that mimic the human sensory experience could aid the development of better and more consistently flavoured foods.          Sponsors                     The Naturejobs Career Expo London 2012 UK's largest career fair and conference focused exclusively on the scientific world. 20 September 2012 - Business Design Centre, London, UK Register today! Career fair is FREE of charge. Conference fee is £40.               Careers & Jobs ▲top               Life sciences: All jazzed up ▶     Bioscience is thriving in New Orleans as the city bounces back from multiple disasters.                   Piled too high ▶     A passion for science is admirable, but can have unwanted outcomes, argues Mariano A. Loza-Coll.                   Clarification ▶                   Careers related news & comment                   Serious questions | Britain aims for broad open access | A workforce out of balance | Informed consent: A broken contract | Nuclear waste: Use fast reactors to burn plutonium Barry W. Brook, Tom Blees & William H. Hannum | Drug discovery: Spread the risk of antibiotic research Chris Schofield | AIDS: China must provide education on HIV Jian Zhang & Nan Jiang             naturejobs.com Science jobs of the week       The American Journal of Hypertension is seeking an Executive Editor     American Journal of Hypertension            Postdoctoral Researcher     John Innes Centre            Two Postdoctoral Positions (2 years) in Biogeochemistry - Iron and natural organic matter as transporters of trace metals in aquatic systems     Umea University            PhD Studentship: Environmental Justice and Ecosystem Services     University of Exeter          No matter what your career stage, student, postdoc or senior scientist, you will find articles on naturejobs.com to help guide you in your science career. 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