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作者:Lagrange, A. -M.; Wilkinson, C.; Malin, M.; Boccaletti, A.; Perrot, C.; Matra, L.; Combes, F.; Beust, H.; Rouan, D.; Chomez, A.; Milli, J.; Charnay, B.; Mazevet, S.; Flasseur, O.; Olofsson, J.; Bayo, A.; Kral, Q.; Carter, A.; Crotts, K. A.; Delorme, P.; Chauvin, G.; Thebault, P.; Rubini, P.; Kiefer, F.; Radcliffe, A.; Mazoyer, J.; Bodrito, T.; Stasevic, S.; Langlois, M.
作者单位:Universite PSL; Observatoire de Paris; Centre National de la Recherche Scientifique (CNRS); CY Cergy Paris Universite; Sorbonne Universite; Universite Paris Cite; Centre National de la Recherche Scientifique (CNRS); Institut de Planetologie et d'Astrophysique de Grenoble (IPAG); Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Johns Hopkins University; Space Telescope Science Institute; Trinity College Dublin; Universite PSL; Observatoire de Paris; Centre National de la Recherche Scientifique (CNRS); Sorbonne Universite; College de France; Universite Cote d'Azur; Observatoire de la Cote d'Azur; Universite Claude Bernard Lyon 1; Centre National de la Recherche Scientifique (CNRS); Ecole Normale Superieure de Lyon (ENS de LYON); European Southern Observatory; Inria; Centre National de la Recherche Scientifique (CNRS); Ecole Normale Superieure de Lyon (ENS de LYON); Universite PSL; Ecole Normale Superieure (ENS)
摘要:Planets are thought to form from dust and gas in protoplanetary disks, with debris disks being the remnants of planet formation. Aged a few million up to a few billion years, debris disks have lost their primordial gas, and their dust is produced by steady-state collisions between larger, rocky bodies1,2. Tens of debris disks, with sizes of tens, sometimes hundreds, of astronomical units have been resolved with high-spatial-resolution, high-contrast imagers at optical and near-infrared or (sub...
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作者:Telford, O. Grace; Sandstrom, Karin M.; McQuinn, Kristen B. W.; Glover, Simon C. O.; Tarantino, Elizabeth J.; Bolatto, Alberto D.; Vaught, Ryan J. Rickards
作者单位:Princeton University; Carnegie Institution for Science; Rutgers University System; Rutgers University New Brunswick; University of California System; University of California San Diego; Space Telescope Science Institute; Ruprecht Karls University Heidelberg; University System of Maryland; University of Maryland College Park; University System of Maryland; University of Maryland College Park
摘要:The James Webb Space Telescope (JWST) has revealed unexpectedly rapid galaxy assembly in the early Universe, in tension with galaxy-formation models1, 2-3. At the low abundances of heavy elements (metals) and dust typical in early galaxies, the formation of molecular hydrogen and its connection to star formation remain poorly understood. Some models predict that stars form in predominantly atomic gas at low metallicity4,5, in contrast to molecular gas at higher metallicities6. Despite repeated...
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作者:Dai, Jinye; Patzke, Christopher; Liakath-Ali, Kif; Seigneur, Erica; Sudhof, Thomas C.
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作者:[Anonymous]
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作者:Voris, Jared T.; Zelenitsky, Darla K.; Kobayashi, Yoshitsugu; Modesto, Sean P.; Therrien, Francois; Tsutsumi, Hiroki; Chinzorig, Tsogtbaatar; Tsogtbaatar, Khishigjav
作者单位:University of Calgary; Hokkaido University; Cape Breton University; Hokkaido University; North Carolina State University; Mongolian Academy of Sciences
摘要:Eutyrannosaurians were large predatory dinosaurs that dominated Asian and North American terrestrial faunas in latest Cretaceous times. These apex predators arose from smaller-bodied tyrannosauroids during the 'middle' Cretaceous that are poorly known owing to the paucity of fossil material1, 2-3. Here we report on a new tyrannosauroid, Khankhuuluu mongoliensis gen. et sp. nov., from lower Upper Cretaceous deposits of Mongolia that provides a new perspective on eutyrannosaurian origins and evo...
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作者:Hill, Ryan; Yin, Yian; Stein, Carolyn; Wang, Xizhao; Wang, Dashun; Jones, Benjamin F.
作者单位:Northwestern University; Northwestern University; Northwestern University; Northwestern University; Cornell University; University of California System; University of California Berkeley; University of California System; University of California Berkeley; Northwestern University; National Bureau of Economic Research
摘要:Scientists and inventors set the direction of their work amid evolving questions, opportunities and challenges, yet the understanding of pivots between research areas and their outcomes remains limited1, 2, 3, 4-5. Theories of creative search highlight the potential benefits of exploration but also emphasize difficulties in moving beyond one's expertise6, 7, 8, 9, 10, 11, 12, 13-14. Here we introduce a measurement framework to quantify how far researchers move from their existing work, and app...
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作者:Slotte, Aril; Salthaug, Are; Vatnehol, Sindre; Johnsen, Espen; Mousing, Erik Askov; Hoines, Age; Broms, Cecilie Thorsen; Bjarnason, Sigurvin; Homrum, Eydna i; Skagseth, Oystein; Stenevik, Erling Kare
作者单位:Institute of Marine Research - Norway; Faroe Marine Research Institute (FAMRI)
摘要:Entrainment is a process in schooling migratory fish whereby routes to suitable habitats are transferred from repeat spawners to recruits over generations through social learning1. Selective fisheries targeting older fish may therefore result in collective memory loss and disrupted migration culture2. The world's largest herring (Clupea harengus) population has traditionally migrated up to 1,300 km southward from wintering areas in northern Norwegian waters to spawn at the west coast. This con...