New paper in PNAS: We find Heaps' law, empirical regularity first identified in how diversity of vocabulary scales in books, also describes function diversity in cells and many human organizations (with cities being a notable exception). w/ @sfiscience.bsky.social www.pnas.org/doi/10.1073/...

Are you an early-career researcher or research professional with a broad interest in complexity science?

Applications are open for SFI’s 2026 CSSS program, a three-week, in-residence program offering an intensive introduction to complexity science.

Apply by Feb 4, 2026
santafe.edu/csss

PhD applications at MIT Sloan are live! Deadline is Dec 1. If you’re excited about social system modeling research and want to work with me or our other fantastic faculty, we’d love to see your application to the system dynamics group!
mitsloan.mit.edu/programs/phd...

Mastering a skill can take decades, but learning unfolds across timescales from moments to days. A new paper by three former SFI postdocs presents a theoretical model of nested timescales of learning, offering a unified, multi-scale account of skill acquisition. www.santafe.edu/news-center/...

Excited to share our new paper in NPJ Complexity! We propose a unified, multiscale model of skill acquisition—linking moments to decades. Ideated at the
@sfiscience.bsky.social-JSMF conference research jam, and years (many revisions) later, it’s finally out. www.nature.com/articles/s44...

Big thanks to Faye Flam and @bloomberg.com for the thoughtful interview and excellent article on polarization.
www.bloomberg.com/opinion/arti...