Environmental damage from insecticide overuse is a major concern, particularly for conservation of “good” insects such as pollinators that ensure stable production of food crops like fruits and ...

The first century BCE fall of the Roman Republic and Ptolemaic Kingdom and subsequent rise of the Roman Empire were among the most important political transitions in the history of Western ...

Global change is challenging plant and animal populations with novel environmental conditions, including increased atmospheric CO 2 concentrations, warmer temperatures, and altered precipitation ...

Culture is a powerful force that touches all aspects of human life, from health and reproduction to food and clothing technology, in every known human population around the world. Human cultural ...

The PNAS editors would like to thank all the individuals who dedicated their considerable time and expertise to the journal by serving as reviewers and guest editors in 2023. Their generous ...

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Cliffs of brown North Mountain Basalt atop latest Triassic-age white and red lacustrine strata of the Fundy Basin, outcropping along the north shore of the Bay of Fundy at Five Islands Provincial Park ...