6740期

最新文章

• Direct effects of mountain uplift and topography on biodiversity AI翻译
  作者：Marder, Eyal; Smiley, Tara M.; Yanites, Brian J.; Kravitz, Katherine
  作者单位：Indiana University System; Indiana University Bloomington; State University of New York (SUNY) System; Stony Brook University; University of Massachusetts System; University of Massachusetts Amherst
  摘要：Biodiversity hotspots in Earth's mountain ranges suggest a strong connection between topographic development and biological processes. However, it remains unclear whether high biodiversity in mountain ranges is an evolutionary response to the rate of relief generation during mountain building. Focusing on small mammals, such as rodents, we used coupled landscape-biological simulations to show that biodiversity increases with the magnitude and rate of tectonic uplift. This relationship, visible...
• TRUMP ADMINISTRATION Overseas universities see opportunity in US 'brain drain' AI翻译
  作者：Offord, Catherine
• Threats to Chile scopes estimated AI翻译
  作者：Brainard, Jeffrey
• Women write better review letters AI翻译
  作者：Brainard, Jeffrey
• Isotopic and compositional constraints on the source of basalt collected from the lunar farside AI翻译
  作者：Che, Xiaochao; Long, Tao; Nemchin, Alexander; Xie, Shiwen; Qiao, Le; Li, Zengsheng; Ban, Yiyi; Fan, Runlong; Yang, Chun; Liu, Dunyi
  作者单位：China Geological Survey; Institute of Geology, Chinese Academy of Geological Sciences; Chinese Academy of Geological Sciences; China Geological Survey; Chinese Academy of Geological Sciences; Institute of Geology, Chinese Academy of Geological Sciences; Curtin University; Shandong University
  摘要：Volcanism on the Moon has produced surface basalt deposits, which record lunar interior processes. The Chang'e-6 mission retrieved samples from the South Pole-Aitken basin (SPA) on the Moon's far side. We analyzed basalt fragments collected by Chang'e-6 and found that their composition resembles that of low-titanium basalts previously sampled by the Apollo missions. Uranium-lead (U-Pb) dating indicated a basalt age of 2823.0 +/- 5.9 million years and a source U-238/Pb-204 ratio (mu-value) of 4...
• COSMOLOGY Did dark energy's cosmic push vary with time? AI翻译
  作者：Clery, Daniel
• A deep dive into oxygen sensing AI翻译
  作者：Hawkes, Lucy; Kendall-Bar, Jessica
  作者单位：University of Exeter; University of California System; University of California San Diego; Scripps Institution of Oceanography
• Doctors by Nature: How Ants, Apes, and Other Animals Heal Themselves AI翻译
  作者：Drake, John M.
  作者单位：University System of Georgia; University of Georgia
• Cognitive perception of circulating oxygen in seals is the reason they don't drown AI翻译
  作者：McKnight, J. Chris; Bonnelycke, Eva-Maria; Balfour, Steve; Milne, Ryan; Moss, Simon E. W.; Armstrong, Holly C.; Downie, Caitlin; Hall, Ailsa J.; Kershaw, Joanna L.
  作者单位：University of St Andrews; University of St Andrews
  摘要：Marine mammals rely on maintaining sufficient blood oxygen levels while diving to prevent drowning. Generally, oxygen is cognitively imperceptible to mammals that instead sense rising carbon dioxide as a proxy for low oxygen. Not perceiving oxygen, however, is risky for diving mammals. We argue that any ability to alter dives based upon direct perception of oxygen should have been strongly selected for. We exposed diving seals to inhaled gas mixes that were experimentally altered to affect cir...
• Epithelial polarization by the planar cell polarity complex is exclusively non-cell autonomous AI翻译
  作者：Basta, Lena P.; Joyce, Bradley W.; Posfai, Eszter; Devenport, Danelle
  作者单位：Princeton University
  摘要：For cells to polarize collectively along a tissue plane, asymmetrically localized planar cell polarity (PCP) complexes must form intercellular contacts between neighboring cells. Yet, it is unknown whether asymmetric segregation of PCP complexes requires cell-cell contact, or if cell autonomous, antagonistic interactions are sufficient for polarization. To test this, we generated mouse chimeras consisting of dual PCP-reporter cells mixed with unlabeled cells that cannot form PCP bridges. In th...