Proceedings of the National Academy of Sciences

Early Edition

New papers posted daily


Featured Image

PNAS Profile

Profile of NAS member and molecular biologist David Sabatini


Front Matter


  • post thumbnail
  • Inner Workings: Fishing for artifacts beneath the waves
    Conducting archaeological research underwater may be essential to grasping the early history of Homo sapiens. But the logistical and scientific challenges are many. Image courtesy of Maritime Archaeology Trust; photograph by Roland Brookes.





  • post thumbnail
  • Human influence, climate, and fire activity
    Modeling of historic annual fire activity for 37 regions across the continental United States indicates that the relative importance of seasonal temperature, seasonal precipitation, and overall climate in explaining fire activity varied substantially with geography, and that human presence reduced the influence of climate on fire in some regions, according to a study.
  • PRI Icon
  • New Scientist Icon


  • post thumbnail
  • Amygdala and memory
    In a memory retrieval task in which 14 participants, 20-54 years of age, viewed a series of non-emotional images, half of which were followed immediately by electrical stimulation of the participants’ amygdala, a brain region involved in prioritizing memories, researchers found that the participants exhibited improved memory in next-day memory recognition tests for the images that were followed by amygdala stimulation, compared with control images, findings with implications for the development of memory enhancement therapies.
  • Spectrum Icon
  • WebMD Icon


PNAS Direct to Your In Box

Or subscribe to one of our RSS Feeds »



Top Articles

  1. Male homosexuality and maternal immune responsivity to the Y-linked protein NLGN4Y
  2. Inequality in nature and society
  3. Using deep learning and Google Street View to estimate the demographic makeup of neighborhoods across the United States
  4. Mathematical picture language program
  5. Quantitative historical analysis uncovers a single dimension of complexity that structures global variation in human social organization

50 Most-Read Articles »


Follow PNAS on Facebook