2025 Michigan Cosmology Summer School (June 2-6, 2025)

DESI Full-Shape Y1 results are out! (November 2024)
Articles by Science News (PDF), Reuters (PDF), LBL press release, UM press release

LSA Magazine story about our recent (non-DESI) work (May 2024)

  My cosmology textbook is out
(late March 2023 in the UK, May 2023 in the U.S.); instructor resources info; errata

Youtube video of Saturday Morning Physics talk, "The Universe Caught Speeding".

Research Group:

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I am a theoretical cosmologist, and work as a professor of Physics at the University of Michigan. I also currently serve as the Associate Chair for the Physics Graduate Program at UM. I am a member of two large collaborations, Dark Energy Survey (DES, on which I co-led the Theory and Combined Probes working group in 2018-21), and Dark Energy Spectroscopic Instrument (DESI), where I currently co-lead the Key Project in charge of producing cosmological results from the first year of data from the survey. For more detail, see the "About Me" tag on the top right.