intl.pnas.org

Skip to main content Main menu Home Articles Current Special Feature Articles - Most Recent Special Features Colloquia Collected Articles Classics List of Issues Front Matter Front Matter Portal Journal Club News For the Press This Week In in the News Podcasts Authors Information for Authors Editorial and Journal Policies Submission Procedures Fees and Licenses Submit Submit About Editorial Board Staff FAQ Accessibility Statement Rights and Permissions Site Map Contact Journal Club Subscribe Subscription Rates Subscriptions FAQ Open Access Recommend to Your Librarian User menu Log in My Cart Search Search for this keyword Search Advanced search Log in My Cart Search for this keyword Search Advanced Search Home Articles Current Special Feature Articles - Most Recent Special Features Colloquia Collected Articles Classics List of Issues Front Matter Front Matter Portal Journal Club News For the Press This Week In in the News Podcasts Authors Information for Authors Editorial and Journal Policies Submission Procedures Fees and Licenses Submit New Research In Physical Sciences Featured Portals Physics Chemistry Sustainability Science Articles by Topic Applied Mathematics Applied Physical Sciences Astronomy Computer Sciences Earth, Atmospheric, and Planetary Sciences Engineering Environmental Sciences Mathematics Statistics Social Sciences Featured Portals Anthropology Sustainability Science Articles by Topic Economic Sciences Environmental Sciences Political Sciences Psychological and Cognitive Sciences Social Sciences Biological Sciences Featured Portals Sustainability Science Articles by Topic Agricultural Sciences Anthropology Applied Biological Sciences Biochemistry Biophysics and Computational Biology Cell Biology Developmental Biology Ecology Environmental Sciences Evolution Genetics Immunology and Inflammation Medical Sciences Microbiology Neuroscience Pharmacology Physiology Plant Biology Population Biology Psychological and Cognitive Sciences Sustainability Science Systems Biology commits to immediately and freely sharing research data and findings relevant to the novel coronavirus (COVID-19) outbreak. See the free collection of coronavirus papers and learn more about our response to COVID-19 . Click to sign up for Highlights. Volume 118, Issue 10: View articles in the latest issue of . Click here to view selections in the latest issue of . Latest in Anthropology: Composition of inks on ancient Egyptian papyri and lead-based compounds used in writing. Click to read more. Image credit: Kim Ryholt. 1 2 3 4 Front Matter Opinion: Academic-humanitarian technology partnerships: an unhappy marriage? Some key strategies can enable NGOs and universities to work together much more efficiently as they strive to achieve common goals with societal impact. Image credit: International Committee of the Red Cross/Jacob Zocherman. Journal Club: Mutations in metabolic genes can cause antibiotic resistance Research into how this newly uncovered avenue leads to resistance could eventually point to therapeutic strategies. Image credit: Science Source/Doncaster and Bassetlaw Hospitals. News Feature: A sea in the Amazon Did the Caribbean sweep into the western Amazon millions of years ago, shaping the region’s rich biodiversity? Image credit: Tacio Cordeiro Bicudo (University of São Paulo, São Paulo, Brazil), Victor Sacek (University of São Paulo, São Paulo, Brazil), and Lucy Reading-Ikkanda (artist). All Front Matter In the News Parent–offspring conflict in songbird fledging Some songbird parents might improve their own fitness by manipulating their offspring into leaving the nest early, at the cost of fledgling survival, a study finds. Image credit: Gil Eckrich (photographer). Moth scales act as acoustic metamaterials Moth wing scales, which are used for camouflage against bats, act as ultrasound-absorbing metamaterials, according to a study. Image credit: Simon Reichel, Thomas Neil, Zhiyuan Shen, and Marc W. Holderied. Bees' perception of own body size A study finds that bees display an awareness of their own body size and shape as they navigate obstacles during flight. Image credit: Charlotte Doussot. All News Current Issue Submit Sign up for the Highlights newsletter to get in-depth stories of science sent to your inbox twice a month: Sign up for Article Alerts Sign up Science Sessions Podcasts How click beetles jump Marianne Alleyne, Aimy Wissa, and Ophelia Bolmin explain how the click beetle amplifies power to pull off its signature jump. Listen Past Podcasts Subscribe Featured Profile Featured Profile Profile of NAS member and biochemist Se-Jin Lee. Image credit: Se-Jin Lee. Most Read Most Cited An evidence review of face masks against COVID-19 The impact of COVID-19 on small business outcomes and expectations Experienced well-being rises with income, even above $75,000 per year A genomic region associated with protection against severe COVID-19 is inherited from Neandertals A trait-based understanding of wood decomposition by fungi More... Submit Manuscript Twitter Facebook RSS Feeds Email Alerts Articles Current Issue Special Feature Articles – Most Recent List of Issues Portals Anthropology Chemistry Classics Front Matter Physics Sustainability Science Teaching Resources Information Authors Editorial Board Reviewers Subscribers Librarians Press Site Map Updates FAQs Accessibility Statement Rights & Permissions About Contact Feedback Privacy/Legal Copyright © 2021 National Academy of Sciences. Online ISSN 1091-6490...