6794期

最新文章

• Mars mission aims for nuclear propulsion-on a tight deadline Fission-powered space flight, a 60-year dream, would supercharge Solar System exploration AI翻译
  作者：Richter, Hannah
• Lethal conflict after group fission in wild chimpanzees AI翻译
  作者：Sandel, Aaron A.; He, Yixuan; Ren, Junpeng; Kei, Yik Lun; Lee, Kevin C.; Clark, Isabelle R.; Reddy, Rachna B.; Negrey, Jacob D.; Birungi, Charles; Apamaku, Blessing A.; Kanweri, Diana; Kalunga, Davis; Aliganyira, Christopher; Ramirez-Amaya, Sebastian; Nakayima, Phionah; Katumba, Raymond; Kamugyisha, Brian; Acosta-Florez, Daniela; van Boekholt, Bas; Mbabazi, Godfrey; Akamumpa, Erone; Namaganda, Sharifah; Tumusiime, Alfred; Angedakin, Samuel; Reinert, Gesine; Madrid-Padilla, Oscar; Cucuringu, Mihai; Wipf, David; Langergraber, Kevin E.; Watts, David P.; Mitani, John C.
  作者单位：University of Texas System; University of Texas Austin; Arizona State University; Arizona State University-Downtown Phoenix; University of California System; University of California Los Angeles; Arizona State University; Arizona State University-Tempe; Arizona State University; Arizona State University-Tempe; Utah System of Higher Education; University of Utah; University of Arizona; Yale University; University Osnabruck; Makerere University; University of Oxford; University of California System; University of California Los Angeles
  摘要：Territorial conflicts in animals can inform aspects of human warfare, but civil war, with its shifting group identities, has not been previously observed. We report a rare, permanent fission in the largest-known group of wild chimpanzees (Pan troglodytes). Using 30 years of behavioral observations and network analyses, we describe a transition from cohesion to polarization in 2015 and the emergence of two distinct groups by 2018. Over the next 7 years, members of one group made 24 attacks, kil...
• Nutritional specialization and social evolution in woodroaches and termites AI翻译
  作者：Cui, Yingying; Liu, Fangfang; Yuan, Dongwei; Liao, Mingtao; Li, Zhaoxin; Luan, Yun-Xia; Yu, Shuxin; Zhu, Kesen; Gao, Qian; Cheng, Yunlong; Fang, Gangqi; Wang, Zongqing; Zhu, Shiming; Xu, Jinlan; Wang, Shuai; Herrera, Melissa Sanchez; Huang, Qiuying; Su, Xiaohong; Wang, Zhang; Xiang, Hui; Lo, Nathan; Boomsma, Jacobus J.; Zhan, Shuai; Li, Sheng
  作者单位：South China Normal University; South China Normal University; South China Normal University; Chinese Academy of Sciences; Center for Excellence in Molecular Plant Sciences, CAS; Southwest University - China; China West Normal University; American Museum of Natural History (AMNH); Universidad de los Andes (Colombia); Huazhong Agricultural University; Northwest University Xi'an; South China Normal University; University of Sydney; University of Copenhagen
  摘要：Woodroach biparental care and termite sibling altruism evolved from solitary cockroach ancestors after nutritional specialization on nutrient-deficient deadwood, but the accompanying genomic changes remained unclear. We sequenced eight new species of the order Blattodea, showing stepwise contracted genomes. Woodroach brood rearing remained constrained by deactivated oxidative phosphorylation and peroxisome genes, consistent with slow immature growth. Termites lost key genes that mediate sperm ...
• Cash isn't enough to get scientists to spot errors, project finds: Now the ERROR project is promising an additional incentive: a publication AI翻译
  作者：Chawla, Dalmeet Singh
• Emergent predictability in microbial ecosystems AI翻译
  作者：Moran, Jacob; Graham, Lucas C.; Tikhonov, Mikhail
  作者单位：Washington University (WUSTL); University of Michigan System; University of Michigan
  摘要：A long-standing hypothesis of microbial ecology is that simple patterns might persist despite community complexity or even emerge because of it. However, the concept of emergent simplicity remains partly intuitive. Here, we defined emergent predictability of microbial ecosystems based on the predictive power of coarsened descriptions that group individual microbial strains into broader classes. We used two published datasets to show that coarse descriptions became more predictive for more spec...
• Earth and Life: A Four Billion Year Conversation AI翻译
  作者：Sorkhabi, Rasoul
  作者单位：Utah System of Higher Education; University of Utah; Utah System of Higher Education; University of Utah
• As attacks escalate, Iran's universities become targets AI翻译
  作者：Stone, Richard
• Awakening latent regeneration in mammals AI翻译
  作者：Paoli, Julia C.; Whited, Jessica L.
  作者单位：Harvard University
• Diagnostics investments and disease burden AI翻译
  作者：Phillips, Kathryn A.; Horn, Danea M.; Califf, Robert M.
  作者单位：University of California System; University of California San Francisco; University of California System; University of California San Francisco; Duke University
• A shared code for perceiving and imagining objects in human ventral temporal cortex AI翻译
  作者：Wadia, V. S.; Reed, C. M.; Chung, J. M.; Bateman, L. M.; Mamelak, A. N.; Rutishauser, U.; Tsao, D. Y.
  作者单位：Cedars Sinai Medical Center; California Institute of Technology; Cedars Sinai Medical Center; Cedars Sinai Medical Center; University of California System; University of California Berkeley; Howard Hughes Medical Institute
  摘要：Mental imagery allows us to remember previous experiences and imagine new ones. Animal studies have yielded rich insight into mechanisms for visual perception, but the neural mechanisms for visual imagery remain poorly understood. We determined that approximately 80% of visually responsive single neurons in the human ventral temporal cortex (VTC) use a distributed axis code to represent objects. We used that code to reconstruct objects and generate maximally effective synthetic stimuli. We the...