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instagram下了用不了

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instagram下了用不了

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instagram下了用不了

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Jul 22, 2023
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News Feature: Diamonds in the rubble
May 06, 2023
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Opinion: Here’s how we restore productivity and vigor to the biomedical research workforce in the midst of COVID-19
Jul 29, 2023
Opinion: It’s ethical to test promising coronavirus vaccines against less-promising ones
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Opinion: At a Crossroads: Reimagining science, engineering, and medicine—and its practitioners
Jul 15, 2023
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Inner Workings: A pulse of hope in the fight against Alzheimer’s
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Inner Workings: Technique to study poop offers a snapshot of diets, ecosystems, and climate
May 13, 2023
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Core Concept: Lava tubes may be havens for ancient alien life and future human explorers
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Jun 24, 2023
Core Concept: Managed retreat increasingly seen as necessary in response to climate change’s fury
May 27, 2023
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Science and Culture: “Design fiction” skirts reality to provoke discussion and debate
May 27, 2023
Science and Culture: Researchers embrace fashion to show off science concepts
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Science and Culture: Dinosaur art evolves with new discoveries in paleontology
Feb 11, 2023
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Journal Club

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Deep-sea mussels still show biological rhythms tracking sunlight, tides

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People who are likely to dismiss journalism as “fake news” tend to believe the world is predictable

PREVIEW Editorial: Scientific versus Public Debates: A PNAS Case Study

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Since 2013, an expanded front section of PNAS has delved into the stories of science. News Features cover research trends in depth, Inner Workings delve into cutting-edge methods or approaches, Science & Culture articles feature intersections between research and aspects of culture, Core Concepts are substantive explainers of timely terms, and the Journal Club blog highlights recent journal articles of interest. Our Opinion pieces further the debate on topics of interest to scientists. These elements supplement our Profiles and QnAs. All Front Matter materials are freely available.

Podcast

Exploring bivalve shell design

Derek Moulton explains the mathematics behind bivalve shell design.

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