Monday, March 30
4:00 pm - 5:00 pm	High Energy Physics Seminar Online Event New Constraints on Dark Matter from Organic Targets: What Organic Chemistry Can do for Direct Detection Carlos Blanco, University of Chicago,

Tuesday, March 31
4:00 pm - 5:00 pm	▶︎ CANCELED: Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Nonlinear Infrared Microscopy Eric Potma, Professor (Joint Appointment) Electrical Engineering and Computer Science, Chemistry, University of California, Irvine,

Wednesday, April 1
4:00 pm - 5:00 pm	▶︎ CANCELED: Astronomy Colloquium Cahill, Hameetman Auditorium TBD Kathryn Zurek, Professor of Theoretical Physics, California Institute of Technology,
8:00 pm - 9:30 pm	▶︎ CANCELED: Watson Lecture - The Rise of Oxygen in the Atmosphere: A View From the Deep Earth Beckman Auditorium Claire E. Bucholz, Assistant Professor of Geology, Caltech,

Thursday, April 2
4:00 pm - 5:00 pm	▶︎ CANCELED: Physics Colloquium East Bridge 201 (Richard P. Feynman Lecture Hall) From single to statistical: gravitational-wave populations Daniel Holz, University of Chicago,

Friday, April 3
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Reparametrization Modes in CFTs & Applications Felix Haehl, Institute for Advanced Study,
2:00 pm - 3:00 pm	● POSTPONED: TAPIR Seminar Cahill 370 Title to be announced Alexander Grant, Graduate Research Assistant, Department of Physics and Astronomy, Cornell University,

Monday, April 6
4:00 pm - 5:00 pm	High Energy Physics Seminar Online Event Teaching an Old LHC new Higgs Philip Harris, Massachusetts Institute of Technology,

Wednesday, April 8
4:00 pm - 5:00 pm	▶︎ CANCELED: Astronomy Colloquium Cahill, Hameetman Auditorium TBD Heino Falcke, Professor of Astroparticle Physics and Radio Astronomy, Department of Astronomy, Radboud University,

Thursday, April 9
12:00 pm - 1:00 pm	IQIM Postdoctoral and Graduate Student Seminar Online Event Teleportation by size, traversable wormholes, and quantum gravity in the lab Sepehr Ghazi Nezami, Sherman Fairchild Postdoctoral Scholar in Theoretical Physics, Preskill group,
4:00 pm - 5:00 pm	▶︎ CANCELED: Physics Colloquium East Bridge 201 (Richard P. Feynman Lecture Hall) TBA John Preskill, Caltech,

Friday, April 10
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event The Statistical Mechanics of Near-Extremal Black Holes Luca Ilesiu, Princeton University,
7:00 pm - 9:00 pm	Stargazing Lecture Online Event The Circumgalactic Medium: The Gas Around Galaxies Yuguang Chen, PhD Candidiate, Department of Astronomy, Caltech,

Monday, April 13
4:00 pm - 5:00 pm	▶︎ CANCELED: High Energy Physics Seminar Lauritsen 469 Learning Cosmology from the First Starts Julian Muñoz, Harvard University,

Tuesday, April 14
4:00 pm - 5:00 pm	▶︎ CANCELED: Gravitational-Wave Research Seminar Cahill, Hameetman Auditorium The A+ upgrade to the LIGO Interferometers: Progress in two acts GariLynn Billingsley, A+ Deputy Project Leader, LIGO Laboratory, Caltech,

Wednesday, April 15
4:00 pm - 5:00 pm	▶︎ CANCELED: Astronomy Colloquium Cahill, Hameetman Auditorium TBD Amina Helmi, Professor of Dynamics, Structure and Evolution of the Milky Way, Kapteyn Astronomical Institute, University of Groningen,

Friday, April 17
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Towards the geometric picture for gravity amplitudes Jaroslav Trnka, UC Davis,
11:00 am - 12:00 pm	IQIM Postdoctoral and Graduate Student Seminar Online Event Predicting Many Properties of a Quantum System from Very Few Measurements Hsin-Yuan (Robert) Huang, Graduate student, Vidick/Preskill group,
2:00 pm - 3:30 pm	Caltech/UCLA Logic Seminar Online Event Descriptive combinatorics and distributed algorithms Anton Bernshteyn, Department of Mathematical Sciences, Carnegie Mellon University,

Monday, April 20
5:00 pm - 6:00 pm	▶︎ CANCELED: Exploration: The Globe and Beyond Baxter Lecture Hall This seminar has been canceled. Alan Stern, Planetary Scientist, Southwest Research Institute,

Tuesday, April 21
4:00 pm - 5:00 pm	▶︎ CANCELED: Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Martin F. Jarrold, Professor and Robert & Marjorie Mann Chair, Department of Chemistry, Indiana University,

Wednesday, April 22
12:00 pm - 1:00 pm	Logic Seminar Online Event The Poisson Boundary of countable groups Josh Frisch, Department of Mathematics, Caltech,
4:00 pm - 5:00 pm	▶︎ CANCELED: Astronomy Colloquum Cahill, Hameetman Auditorium TBD Didier Queloz, Professor of Astrophysics, University of Cambridge,
8:00 pm - 9:30 pm	▶︎ CANCELED: Watson Lecture - A Geodesy Odyssey: Mapping Disasters From Space Beckman Auditorium Susan Owen, Principal Investigator and Project Scientist, Advanced Rapid Imaging and Analysis (ARIA) for Natural Hazards Project, JPL,

Friday, April 24
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Double-scaled and Supersymmetric SYK Vladimir Narovlansky, Princeton University,
11:00 am - 12:00 pm	IQIM Postdoctoral and Graduate Student Seminar Online Event Harvesting proximity effect in 2D Ferromagnetic Semiconductor Heterostructures for Spin and Valleytronics Ding Zhong, Postdoctoral Scholar, Applied Physics and Materials Science, Faraon Group,
2:00 pm - 3:30 pm	Caltech/UCLA Logic Seminar Online Event Borel asymptotic dimension and hyperfinite equivalence relations Brandon Seward, Department of Mathematics, UC San Diego,

Monday, April 27
10:00 am - 11:00 am	High Energy Physics Seminar Online Event New limit of the neutron electric dipole moment Philipp Schmidt-Wellenburg, Paul Scherrer Institute, Switzerland,

Wednesday, April 29
12:00 pm - 1:00 pm	Logic Seminar Online Event Tiling properties and pointwise ergodic theorems Jenna Zomback, Department of Mathematics, University of Illinois at Urbana-Champaign,
4:00 pm - 5:00 pm	▶︎ CANCELED: Astronomy Colloquium Cahill, Hameetman Auditorium TBD Andrea Ghez, Professor of Physics & Astronomy, Astronomy, UCLA,

Friday, May 1
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event 1+1d adjoint QCD and non-invertible topological lines Kantaro Ohmori, SCGP, Stony Brook University,

Monday, May 4
4:00 pm - 5:00 pm	Caltech/USC/UCLA Joint Topology Seminar Online Event Invariants of 4-manifolds from Khovanov-Rozansky link homology Paul Wedrich, Max Planck Institute/University of Bonn/MSRI,
4:00 pm - 5:00 pm	High Energy Physics Seminar Online Event Composite Higgs Models at the LHC and beyond Da Liu, UC Davis,

Tuesday, May 5
3:00 pm - 3:50 pm	Caltech/UCLA Joint Analysis Seminar Online Event Regularity of the centered fractional maximal function David Beltran, Department of Mathematics, University of Wisconsin-Madison,
4:00 pm - 4:50 pm	Caltech/UCLA Joint Analysis Seminar Online Event TBA Luca Spolaor, Department of Mathematics, UC San Diego,

Wednesday, May 6
12:00 pm - 1:00 pm	Logic Seminar Online Event Big Ramsey degrees for finite binary classes forbidding finitely many structures Andy Zucker, Université Lyon 1,
4:00 pm - 5:00 pm	▶︎ CANCELED: Astronomy Colloquium Cahill, Hameetman Auditorium TBD Masami Ouchi, Associate Professor, University of Tokyo,

Friday, May 8
11:00 am - 12:00 pm	IQIM Postdoctoral and Graduate Student Seminar Online Event Simulating the collapse of false-vacuum bubbles in spin chains Ash Milsted, IQIM Postdoctoral Scholar, Preskill Group,
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event 1+1d adjoint QCD and non-invertible topological lines Dan Harlow, MIT,
3:00 pm - 4:00 pm	Geometry and Topology Seminar Online Event Characterizing handle-ribbon knots Maggie Miller, Department of Mathematics, Princeton University,
7:00 pm - 9:00 pm	Stargazing Lecture Online Event The Loneliest Galaxies in the Universe Mia de los Reyes, PhD Candidate, Department of Astronomy, Caltech,

Monday, May 11
4:00 pm - 5:00 pm	Caltech/USC/UCLA Joint Topology Seminar Online Event Corks, involutions, and Heegaard Floer homology Matthew Hedden, Department of Mathematics, Michigan State University,
4:00 pm - 5:00 pm	High Energy Physics Seminar Online Event David Shih, New Approaches to New Physics Searches at the LHC: Anomaly Detection and Unsupervised Deep Learning, Rutgers,

Wednesday, May 13
12:00 pm - 1:00 pm	Caltech Community Town Hall Online Event
12:00 pm - 1:00 pm	Logic Seminar Online Event Definable versions of Dilworth's theorem Zoltán Vidnyánszky, Kurt Gödel Research Center for Mathematical Logic, University of Vienna,
4:00 pm - 5:00 pm	▶︎ CANCELED: Astronomy Colloquium Cahill, Hameetman Auditorium TBD Joss Bland-Hawthorn, ARC Laureate Fellow Professor of Physics, University of Sydney,
8:00 pm - 9:30 pm	▶︎ CANCELED: Watson Lecture - Quantum Matter: Why Does It Matter? Beckman Auditorium Xie Chen, Associate Professor of Theoretical Physics, Caltech,

Friday, May 15
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Holographic duals of refined partition functions Chiara Toldo, Ecole Polytechnique,
2:00 pm - 3:30 pm	Caltech/UCLA Logic Seminar Online Event Actions of tame abelian product groups Assaf Shani, Department of Mathematical Sciences, Carnegie Mellon University,

Tuesday, May 19
2:00 pm - 3:00 pm	▶︎ CANCELED: Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Marcus Cicerone, Professor of Chemistry, Department of Chemistry, Georgia Instititute of Technology,
3:00 pm - 3:50 pm	Caltech/UCLA Joint Analysis Seminar Online Event Discrete restriction estimates Kevin Hughes, School of Mathematics, University of Bristol,
4:00 pm - 4:50 pm	Caltech/UCLA Joint Analysis Seminar Online Event Classical Potential Theory from the High Ground of Linear Holomorphic PDE Dmitry Khavinson, Department of Mathematics, University of South Florida,

Wednesday, May 20
12:00 pm - 1:00 pm	Logic Seminar Online Event Essentially countable Borel equivalence relations Jan Grebík, Mathematics Institute, University of Warwick,

Friday, May 22
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Sphere packing, 3d gravity, and random CFTs Tom Hartman, Cornell University,
11:00 am - 12:00 pm	IQIM Postdoctoral and Graduate Student Seminar Online Event Fractonic order Wilbur Shirley, Graduate Student, Xie Chen Group,

Tuesday, May 26
4:00 pm - 5:00 pm	▶︎ CANCELED: Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Greg Rieker, Assistant Professor, Department of Mechanical Engineering, University of Colorado Boulder,

Wednesday, May 27
12:00 pm - 1:00 pm	Logic Seminar Online Event Simplicity of the automorphism groups of homogeneous structures Aleksandra Kwiatkowska, Institut für Mathematische, University of Münster, University of Wrocław,
4:00 pm - 5:00 pm	▶︎ CANCELED: Astronomy Colloquium Cahill, Hameetman Auditorium TBD Jean-Michel Desert, Assistant Professor, University of Amsterdam,

Friday, May 29
11:00 am - 12:00 pm	IQIM Postdoctoral and Graduate Student Seminar Online Event Investigating superconductivity in Twisted Bilayer Graphene (TBG) Harpreet Singh Arora, Graduate Student, Nadj-Perge Group,
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Nothing is certain in string compactifications Miguel Montero, Harvard University,

Tuesday, June 2
9:00 am - 9:50 am	Caltech/UCLA Joint Analysis Seminar Online Event Orthogonal Fourier analysis on domains: methods, results and open problems Mihailis Kolountzakis, Department of Mathematics and Applied Mathematics, University of Crete,
10:00 am - 10:50 am	Caltech/UCLA Joint Analysis Seminar Online Event Naked Singularities for the Einstein Vacuum Equations: The Exterior Solution Yakov Shlapentokh-Rothman, Mathematics Department, Princeton University,

Wednesday, June 3
12:00 pm - 1:00 pm	Logic Seminar Online Event A generic negative solution to the von Neumann-Day problem Isaac Goldbring, Mathematics Department, University of California, Irvine,

Friday, June 5
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Higher Symmetry and Anomalies in 4d and 6d QFTs Ken Intriligator, UC San Diego,
11:00 am - 12:00 pm	IQIM Postdoctoral and Graduate Student Seminar Online Event The ghost in the radiation: Robust encodings of the black hole interior. Eugene Tang, Graduate Student, Preskill Group,

Tuesday, June 9
5:00 pm - 6:00 pm	Webinar: Human Impacts on the Atmosphere as Revealed by COVID-19 Online Event

Thursday, June 11
12:00 pm - 1:00 pm	Logic Seminar Online Event Descriptive chromatic numbers of locally finite and everywhere two-ended graphs Felix Weilacher, Department of Mathematical Sciences, Carnegie Mellon University,

Friday, June 12
7:00 pm - 9:00 pm	Stargazing Lecture Online Event Measuring the Speed of Stars More Precisely Than Your Car's Speedometer Ryan Rubenzahl, PhD Candidate, Department of Astronomy, Caltech,