Why rates of phenotypic evolution vary across the tree of life is still not well known. A widespread view holds that fast rates result from the colonization of empty adaptive zones, or sets of similar ...

Conventional elastic metasurfaces for energy focusing are limited by chromatic aberration, preventing broadband operation. Here, we propose an elastic metasurface with achromatic focusing across an ...

In 2006, historian Jo Guldi recalled Google Books as nothing less than a revelation. The company had started digitizing millions of books from university and public libraries. With a single click, ...

Clownfishes in coral garden. Image credit: iStock/fototrav. How sea anemones influence clownfish diversification Well-known for their bright color patterns, clownfishes are found on tropical coral ...

Edited by Mark Thiemens, University of California San Diego, La Jolla, CA; received December 20, 2024; accepted March 18, 2025 ...

Bacterial conjugation is a key driver in the spread of antibiotic resistance. Despite extensive knowledge of the molecular mechanisms of conjugation, the dynamics of plasmid transfer within spatially ...

Despite the widespread success of neural networks, their susceptibility to adversarial examples remains a significant challenge. Adversarial training (AT) has emerged as an effective approach to ...

Contributed by Katepalli R. Sreenivasan; received January 31, 2025; accepted March 23, 2025; reviewed by Sergio Hoyas and Yoshiyuki Tsuji ...

In 2011, the United Nations’ (UN's) General Assembly unanimously approved a resolution that, for the first time, put happiness on the global agenda. The resolution recognized the pursuit of happiness ...

Edited by Zsuzsanna Zsengeller, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; received September 12, 2024; accepted March 8, 2025 by Editorial Board Member Carl F. Nathan ...

Neuropsychiatric conditions, such as schizophrenia, are linked to cortical neuron atrophy and reduced neuronal spine density, a measure of neuroplasticity. Psychedelic drugs, such as lysergic acid ...

E.F.’s research is supported by the project INIC-UV UVA22991; as well as the Fondecyt Project Number 1211323. N. V. Grishin, Y. I. Wolf, E. V. Koonin, From complete genomes to measures of substitution ...