Caltech

Published June 2026 | Version Published Journal Article Open 1. Carnegie Institution for Science 2. University of California, Santa Barbara 3. California Institute of Technology 4. University of California, Berkeley Solar-induced fluorescence (SIF) is an optical signal with the potential to transform applied agricultural science and management. SIF is a small fraction of light emitted when excited chlorophyll molecules return to their ground state after absorbing sunlight.

Published July 20, 2026 | Version Published Journal Article Open Trainor, Ryan F.1, 2 Lamb, Noah R.1, 3, 4 Steidel, Charles C.5 Chen, Yuguang5, 6 Erb, Dawn K.7 Trenholm, Elizabeth8, 9 McClain, Rebecca L.1, 10, 11 Kovach, Io1, 12 1. Franklin & Marshall College 2. Johns Hopkins University 3. Drexel University 4. College of New Jersey 5. California Institute of Technology 6. Chinese University of Hong Kong 7. University of Wisconsin–Milwaukee 8. University of Greenwich 9.

Rudolph A. (Rudy) Marcus, Caltech's John G. Kirkwood and Arthur A. Noyes Professor of Chemistry, passed away on July 16, 2026. The prolific chemist, who approached theory with infinite curiosity and the background of an experimentalist, was five days shy of his 103rd birthday.

Register Today! Join us for a FREE special multimedia concert honoring former Caltech President Thomas F. Rosenbaum, in recognition of his appreciation and support of the arts throughout his tenure. This uplifting program celebrates the intersection of the arts and science and invites the audience to reflect on humanity, our place in the wider universe, and what it means to look outward with wonder and humility.

Learning to Phase-Separate: Contrastive Representation Learning as Active Matter

For the first time, researchers have figured out a way to create chilled molecules containing the radioactive element radium. The resulting laboratory concoctions, generated in part from steps similar to those used to make candy, are poised to help researchers solve one of the biggest mysteries of our universe: How did matter in our early universe come to dominate over its antimatter counterpart? Early in the universe, matter and antimatter were created in equal proportions.

Acknowledgement The authors would like to thank the coIs who contributed to the KRONOS proposal: Eva-Maria Ahrer, Lili Alderson, Jonathan Brande, Jean-Michél Désert, Néstor Espinoza, Peter Gao, Giannina Guzman Caloca, Garrett Levine, Andrew Mann, James Owen, Keighley Rockcliffe, Leslie Rogers, Sara Seager, Alexander Shapiro, Pa Chia Thao, and Shreyas Vissapragada.

Published June 2026 | Version Published Journal Article Metadata-only The neural crest is an important stem cell population characterized by its multipotency, migratory behaviour and broad ability to differentiate into numerous derivatives throughout the vertebrate body, as diverse as cell types contributing to the cardiovascular system, craniofacial skeleton, peripheral nervous system and pigmentation of the skin.

Published April 2026 | Version Published Journal Article Metadata-only 1. California Institute of Technology 2. University Hospital Heidelberg 3. Heidelberg University Copyright and License Copyright © 2026 by the American Society of Nephrology

Published January 2026 | Version Published Journal Article Open 1. California Institute of Technology 2. Institut Terre et environnement de Strasbourg, UMR7063, Université de Strasbourg/CNRS, 67084 Strasbourg, France The 1957 Andreanof, Aleutian Is., earthquake (1957 March 9, 51.53°N, 175.63°W, d = 25 km) is among the most enigmatic great earthquakes instrumentally recorded.