Recent studies in mice suggest that how the egg cells hold onto and get rid of their proteins may be key to this survival. Although most proteins are renewed every few days, two studies show that some ...

Mammalian organs, including the lung and the kidney, often use a branched design to maximize their functional capacity and efficiency. Lung formation requires two developmental processes: branching ...

In research using laptop screens, cats quickly learned to associate sounds and animations. Image credit: Sheila Fitzgerald/Shutterstock.

Over 4 million premature deaths per year are attributed to air pollution, most of which are in low- and middle-income countries where residents do not have access to reliable information on air ...

Chickens are the world’s most numerous domestic animal. In order to understand when, where, and how they first became associated with human societies, we critically assessed the domestic status of ...

When Carl Linnaeus invented binomial nomenclature in the 18th century, it provided a universal language for scientists. Giving each species a unique name is essential for effective communication, ...

Percentage of use of 15% was estimated from the actual use of mAbs during the pandemic, which was given to patients at high risk for hospitalization. The 75% estimate assumes a major national effort ...

Plasmonic materials have been touted as ideal photocatalysts due to their extremely large optical cross-sections and ability to generate uniquely energetic nanoscale environments. However, many ...

As a signatory to the San Francisco Declaration on Research Assessment, PNAS is invested in improving the evaluation of scholarly research outputs. We track a range of article and journal metrics, ...

PNAS publishes exceptional research in all branches of the biological, physical, and social sciences. In addition to research, PNAS publishes Front Matter, Perspectives, and more.

Killingsworth, Kahneman, and Mellers’ [KKM, (1)] attempt to resolve their dispute about whether money can buy happiness is laudable. Their contribution shifts the focus from averages to other ...

Debris flows are fast-flowing and dangerous slurries of soil and water that often form when intense rainfall soaks hillsides burned by wildfire. As climate change intensifies this hazard, models ...