Larry Smarr standing before a data visualization of gut microbiome bacterial species and interactions
Distinguished Professor Emeritus · UC San Diego

Larry Smarr

Fifty-five years at the frontier of general relativity, supercomputing, cyberinfrastructure, and the quantified self.

Scientific career since 1970 · Founding Director, NCSA · 1985–2000 · Founding Director, Calit2 · 2000–2020
1973Smarr Mass Formula
170+Publications
560Presentations
1985Founded NCSA
3NIH Directors advised
16S PCA analysis showing five distinct microbiome states across an eight-year self-study
16S PCA clustering across eight years of self-tracking — the speaker as five distinct microbial "selves." UC San Diego, 2025
Featured Research

The individual as instrument.

Since 2010, an eight-year longitudinal study of a single human gut microbiome — mine — has produced one of the densest self-quantification datasets in medicine.

Five distinct microbial "selves," separated by inflammatory bowel disease onset, surgery, dietary intervention, and time-restricted eating. Each dot in the analysis represents a single day; each cluster, a chapter in a life measured continuously.

Read the essay →
Research Domains

Five decades. Five arcs.

From gravitational-wave simulations at Harvard to gut-microbiome longitudinal studies at UC San Diego — a career traced through the tools we build to see farther.

Wireframe visualization of gravitational-wave curvature from colliding black holes
01 · 1973–2018

General Relativity

Numerical simulation of black-hole collisions and gravitational-wave sources.

59 items
Astronomy and astrophysics research imagery
02 · 1975–2026

Astronomy & Astrophysics

Computational cosmology, cluster cores, and large-scale structure.

33 items
Cyberinfrastructure network diagram
03 · 1982–2025

Cyberinfrastructure

Founding NCSA, seeding Mosaic, OptIPuter, Calit2, and the distributed research platforms.

384 items
Biomedical data visualization
04 · 1988–2025

Biomedical Data

Longitudinal self-quantification and microbiome dynamics.

151 items
Environmental sensing and remote observation imagery
05 · 2005–2021

Environment

WIFIRE, green computing, and carbon-constrained internet.

65 items
Editorial collage of Larry Smarr, an NCSA machine room, and the NCSA Mosaic browser
1985

Founding director of the National Center for Supercomputing Applications at the University of Illinois — the birthplace of the modern web browser.

Recent Work

Selected talks, papers, and press.

Microbiome talk slide
Featured Talk

Revealing the Dynamics of an Individual's Gut Microbiome

Gordon Lab · Washington University in St. Louis · May 2025

An eight-year longitudinal analysis revealing five distinct microbial "selves" separated by IBD onset, surgery, dietary intervention, and time-restricted eating.

Watch talk →
NRP PEARC 2024
Publication

The National Research Platform

PEARC '24 · Multi-tenant Kubernetes for science

EXODUS2 conference
Talk

EXODUS2 Conference — Calit2 Founding Director

San Diego · 2025

CENIC AI Resource announcement
Press

The CENIC-AI Resource

CENIC Annual Conference · November 2024

HPC award ceremony
Honor

HPCwire Lifetime Achievement Award

Supercomputing 2024 · Atlanta

Recent Honors

Recognition.

Roger Revelle Medal presentation

Roger Revelle Medal

UC San Diego · 2023

Honorary doctorate ceremony

Honorary Doctorate

2024

IEEE Fellow ceremony

IEEE Fellow

2024

Home · Career · Bio

Biography

Larry Smarr holds the title of Distinguished Professor Emeritus at UC San Diego in the Department of Computer Science and Engineering, at the Jacobs School of Engineering.

He was Founding Director of the California Institute for Telecommunications and Information Technology (Calit2) from 2000 to 2020; Founding Director of the National Center for Supercomputing Applications at the University of Illinois Urbana-Champaign from 1985 to 2000; and Founding Director of the National Computational Science Alliance from 1997 to 2000.

In 2006 he received the IEEE Computer Society Tsutomu Kanai Award for his lifetime achievements in distributed computing systems, and in 2014 the Golden Goose Award. He served on the NASA Advisory Council to four NASA Administrators, was chair of the NASA Information Technology Infrastructure Committee, and the NSF Advisory Committee on Cyberinfrastructure, and for eight years was a member of the NIH Advisory Committee to the NIH Director, serving three directors.

Career milestones

  1. 1970Begins scientific career in general relativity, two years after the term "black hole" is coined.
  2. 1973First peer-reviewed paper — Mass Formula for Kerr Black Holes, Phys. Rev. Lett. 30, 71–73. The result is now known as the Smarr Mass Formula.
  3. 1975Ph.D., University of Texas at Austin — numerical simulation of two colliding black holes.
  4. 1985Founding Director, National Center for Supercomputing Applications (NCSA), University of Illinois.
  5. 2000Founding Director, California Institute for Telecommunications and Information Technology (Calit2), UC San Diego.
  6. 2020Retires from Calit2 directorship; continues as Distinguished Professor Emeritus.