Wildlife biologist David Wiens was extremely nervous the first time he shot an owl. He steadied himself in the evening darkness of an Oregon fire road, pointed his shotgun at a big barred owl perched ...

Designing and constructing mechanical systems to operate at a microscale are challenging tasks. Yet, organisms such as fruit flies perform many of the desired movements and functions of a microscale ...

The COVID-19 pandemic highlighted the importance of gathering information on pathogen characteristics as early as possible when an outbreak strikes. But it also underscored how quickly much of that ...

Contributed by M. Brian Maple; received October 1, 2024; accepted February 13, 2025; reviewed by Satoshi Fujimoto and Xiaolong Liu ...

Illustration of the reorganization of jaw muscles and the skull following an increase in brain size during bird evolution. The avian skull underwent significant modifications during the evolution of ...

P. I. Fields, R. V. Swanson, C. G. Haidaris, F. Heffron, Mutants of Salmonella typhimurium that cannot survive within the macrophage are avirulent. Proc. Natl. Acad ...

The authors note that the following statement should be added to the Acknowledgments: “S.S. was additionally supported by Pediatric Ophthalmology Career Starter Research Grant from the Knights Templar ...

Edited by Lily Jan, Howard Hughes Medical Institute–University of California San Francisco, San Francisco, CA; received August 17, 2024; accepted March 3, 2025 ...

Myosins are ubiquitous eukaryotic molecular motors responsible for providing tensile forces in cells and motile power at the nanoscale. This allosteric mechanoenzyme undergoes a series of ...

The authors note that Fig. 3 appeared incorrectly. The six panels are labeled incorrectly. The labels A–F should increase row-wise, not column-wise. The corrected figure appears below. The online ...