Caltech’s E&S magazine is the Institute’s flagship publication, exploring the ideas and discoveries of its researchers, students, and alumni. E&S+ is our online platform; here you will find digital versions of the magazine’s top stories “plus” additional content created and curated just for this site. We welcome your feedback at

E&S+: Because there’s always more to the story…


23,000 living alumni in the U.S. and around the world
1005 undergraduate students
1,272 graduate students
300 professorial faculty
54% of all students are men, 46% are women
3,900 Caltech employees
5,000+ JPL employees