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PNAS commits to immediately and freely sharing research data and findings relevant to the novel coronavirus (COVID-19) outbreak.
See the free collection of PNAS coronavirus papers and learn more about our response to COVID-19.
See the free collection of PNAS coronavirus papers and learn more about our response to COVID-19.
Front Matter
Conventional theory says Jupiter formed where it is now. Two groups working independently have proposed an intriguing alternative.
Image credit: Hubble Space Telescope – NASA, ESA, and Amy Simon (NASA Goddard).
Image credit: Photo Kozyr/ Shutterstock.
Given the considerable uncertainty arising from underlying disease and social dynamics, detailed refinements to models often create a misleading sense of precision.
Image credit: Shutterstock/Travelerpix.
In the News
Complex visual signaling and semantics in deep-ocean-dwelling cephalopods.
Image credit: © 2010 Monterey Bay Aquarium Research Institute (MBARI).
The bilaterian Ikaria wariootia represents one of the oldest organisms with anterior and posterior differentiation.
Image credit: Sohail Wasif (University of California, Riverside, CA).
Inadvertent introductions of herbivores can restore lost ecological functions.
Image credit: Jens-Christian Svenning.
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Fabiola Gianotti, Marcia McNutt, and Donna Shalala discuss the past, present, and future of women in STEM.
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Profile of NAS member and neuroscientist Christopher A. Walsh
