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Front Matter
Several aspects of the proposal, which aims to expand open access, require serious discussion and, in some cases, a rethink.
Image credit: Dave Cutler (artist).
Urban living can pressure flora and fauna to adapt in intriguing ways. Biologists are starting to take advantage of this convenient laboratory of evolution.
Image credit: Kristin Winchell (Washington University in St. Louis, St. Louis).
In the News
A study suggests a putative gene-expression hallmark common to monogamous male vertebrates of some species, namely cichlid fishes, dendrobatid frogs, passeroid songbirds, common voles, and deer mice, and identifies 24 candidate genes potentially associated with monogamy.
Image courtesy of Yusan Yang (University of Pittsburgh, Pittsburgh).
Physical and social well-being in old age are linked to self-assessments of life worth, and a spectrum of behavioral, economic, health, and social variables may influence whether aging individuals believe they are leading meaningful lives.
Image courtesy of Pixabay/MabelAmber.
A reconstruction of ocean heat storage since 1871 finds that oceans gained heat during the years 1921-1946 at the same rate as since 1990, and the findings on ocean circulation changes can help predict future patterns of warming and sea level rise.
Image courtesy of Laure Zanna.
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Daniel Wieczynski and Van Savage show how climate affects the diversity of forests.
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PNAS Profile of NAS member and biochemist Hao Wu
