Tuesday, January 5
11:00 am - 12:15 pm	Chemical Physics Seminar Online Event Free Range Frequency Combs: mobilizing frequency comb laser technology from hypersonic research to atmospheric sensing Greg Rieker, Associate Professor, Mechanical Engineering, University of Colorado- Boulder,
12:00 pm - 1:00 pm	Mathematics Colloquium Online Event The geometry and topology of scalar curvature Chao Li, Department of Mathematics, Princeton University,
3:00 pm - 3:55 pm	Caltech/UCLA Joint Analysis Seminar Online Event Radon-like Transforms, Geometric Measures, and Invariant Theory Philip T. Gressman, Department of Mathematics, University of Pennsylvania,
4:00 pm - 4:55 pm	Caltech/UCLA Joint Analysis Seminar Online Event Extreme values of the argument of the zeta function Alexander Dobner, Department of Mathematics, UCLA,

Wednesday, January 6
1:30 pm - 2:30 pm	High Energy Theory Informal Seminar Online Event A violation of global symmetries from replica wormholes and the fate of black hole remnants Luca Iliesiu, Stanford University,
4:00 pm - 5:00 pm	Astronomy Colloquium Online Event Cosmic Rays in Multiphase Gas Ellen Zweibel, W. L. Kraushaar Professor of Astronomy and Physics, University of Wisconsin-Madison,
4:00 pm - 5:45 pm	▶︎POSTPONED: Diverse Minds Seminar Online Event The Hierarchy of Knowledge in Machine Learning & Related Fields and Its Consequences Dr. Timnit Gebru, Research Scientist, Artificial Intelligence, Black in AI,
4:00 pm - 5:45 pm	The hierarchy of knowledge in machine learning & related fields and its consequences Dr. Timnit Gebru, Research Scientist, Artificial Intelligence, Black in AI,

Thursday, January 7
9:00 am - 9:55 am	Analysis Seminar Online Event Quantitative stability for minimizing Yamabe metrics Robin Neumayer, Department of Mathematics, Northwestern University,
12:00 pm - 1:00 pm	Mathematics Colloquium Online Event Actions of Homeo and Diffeo groups on manifolds Lei Chen, Department of Mathematics, Caltech,
4:00 pm - 5:00 pm	Physics Colloquium Online Event Enabling novel light phenomena at the subwavelength scale Marin Soljačić, MIT,

Friday, January 8
3:00 pm - 4:00 pm	Geometry and Topology Seminar Online Event Orthogonal group and higher categorical adjoints David Ayala, Department of Mathematical Sciences, Montana State University,
4:00 pm - 5:00 pm	Math Graduate Student Seminar Online Event Categorical Trace Tamir Hemo, Department of Mathematics, Caltech,

Monday, January 11
12:00 pm - 1:00 pm	Logic Seminar Online Event A new regularity property of the Haar null ideal Zoltán Vidnyánszky, Department of Mathematics, Caltech,
7:30 pm - 9:30 pm	Astronomy on Tap Online Event "The Cosmic Gold Rush" and "The Secret to Building the Biggest Galaxies: Cannibalism" Igor Andreoni, Postdoctoral Fellow, Department of Astronomy, Caltech, Rachel Bezanson, Assistant Professor, Department of Physics and Astronomy, University of Pittsburgh,

Tuesday, January 12
10:00 am - 11:15 am	Chemical Physics Seminar Online Event Nucleation enhancement in new particle formation from the vapor phase and water transport through gas-liquid interfaces in organic aerosols Ruth Signorell, Professor of Physical Chemistry, Department of Chemistry and Applied Bioscience, ETZ Zurich,
12:00 pm - 1:00 pm	Mathematics Colloquium Online Event Thin sets of primes from reductions of abelian varieties and K3 surfaces Yunqing Tang, Laboratoire de Mathématiques d'Orsay, CNRS & Université Paris-Sud,

Wednesday, January 13
1:30 pm - 2:30 pm	High Energy Theory Seminar Online Event Ensemble averages of torus orbifolds Nathan Benjamin, Princeton University,
5:00 pm - 6:00 pm	Watson Lecture - Artificial Intelligence: How it Works and What it Means for the Future Online Event Yisong Yue, Professor of Computing and Mathematical Sciences, Division of Engineering and Applied Science, Caltech,

Thursday, January 14
9:00 am - 9:55 am	Analysis Seminar Online Event Stability of kinks in one-dimensional Klein-Gordon equations Pierre Germain, Courant Institute of Mathematical Sciences, NYU,
11:00 am - 12:00 pm	A Conversation with Zoom Founder and CEO Eric S. Yuan Online Event Eric S. Yuan, Founder & Chief Executive Officer, Zoom,
4:00 pm - 5:00 pm	Physics Colloquium Online Event Choreographing Quantum Spin Dynamics with Light Monika Schleier-Smith, Stanford University,

Friday, January 15
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event New non-perturbative effects in the gravitational path integral Jordan Cotler, Harvard University,
1:00 pm - 2:00 pm	CMX Student/Postdoc Seminar Online Event Estimating model error using sparsity-promoting ensemble Kalman inversion Jinlong Wu, Postdoctoral Scholar Research Associate, Environmental Science and Engineering Geological and Planetary Sciences, Caltech,
2:00 pm - 3:00 pm	TAPIR Seminar Online Event Towards realistic post-merger simulations of binary neutron stars with SphericalNR Vassilios Mewes, Postdoctoral Research Associate, Computational Astrophysics, Oak Ridge National Lab,
3:00 pm - 4:00 pm	Geometry and Topology Seminar Online Event Links all of whose branched cyclic covers are L-spaces Hannah Turner, Department of Mathematics, UT, Austin,

Tuesday, January 19
3:00 pm - 3:55 pm	Caltech/UCLA Joint Analysis Seminar Online Event Stationary random entire functions and related questions Adi Glücksam, Department of Mathematics, University of Toronto,
4:00 pm - 4:55 pm	Caltech/UCLA Joint Analysis Seminar Online Event Joints of varieties Yufei Zhao, Department of Mathematics, MIT,

Wednesday, January 20
12:00 pm - 1:00 pm	Astronomy Colloquium Online Event Mergers, magnetars and multi-messengers Stephen Smartt, Professor, Queens University Belfast,
12:00 pm - 1:00 pm	Logic Seminar Online Event Universal minimal flows of homeomorphism groups of high-dimensional manifolds Todor Tsankov, Institut Camille Jordan, Université Claude Bernard – Lyon 1,

Thursday, January 21
9:00 am - 9:55 am	Analysis Seminar Online Event The Robin eigenvalue problem: statistics and arithmetic Zeev Rudnick, School of Mathematical Sciences, Tel-Aviv University,
4:00 pm - 5:00 pm	Physics Colloquium Online Event Neutrino Geoscience: measuring the Earth's neutrino flux and constraining its composition Hiroko Watanabe, Tohoku University,

Friday, January 22
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Quantum Extremal Islands Made Easy Rob Myers, Perimeter Institute,
3:00 pm - 4:00 pm	Geometry and Topology Seminar Online Event A family of 3d steady gradient solitons that are flying wings Yi Lai, Department of Mathematics, UC Berkeley,
4:00 pm - 5:00 pm	Math Graduate Student Seminar Online Event TBA TBA,

Monday, January 25
12:00 pm - 1:00 pm	Logic Seminar Online Event A method for showing Π03 -completeness Vassilios Gregoriades, Department of Mathematics, National Technical University of Athens,
4:00 pm - 5:00 pm	High Energy Physics Seminar Online Event Generalizing the Double-Copy: Masses and Higher-Derivatives Callum Jones, UCLA,
5:00 pm - 6:00 pm	Webinar: The Ultraviolet Spotlight on Exoplanets Online Event

Wednesday, January 27
4:00 pm - 5:00 pm	Astronomy Colloquium Online Event Reverberation mapping black hole accretion flows Erin Kara, Assistant Professor of Physics, Massachusetts Institute of Technology,

Thursday, January 28
9:00 am - 9:55 am	Analysis Seminar Online Event Nonlinear wave equations, the weak null condition, and radiation fields Joseph Keir, Mathematical Institute, University of Oxford,
4:00 pm - 5:00 pm	Physics Colloquium Online Event Predicting the universe today from looking at the past with the Atacama Cosmology Telescope Suzanne Staggs, Princeton University,

Friday, January 29
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event TBD David Vegh, Queen Mary University of London,
2:00 pm - 3:00 pm	TAPIR Seminar Online Event The Most Distant Quasars in the Universe Feige Wang, Hubble Fellow, Department of Astronomy and Steward Observatory, University of Arizona,
3:00 pm - 4:00 pm	Geometry and Topology Seminar Online Event Choosing points on cubic plane curves Weiyan Chen, Yau Mathematical Sciences Center, Tsinghua University,
7:00 pm - 9:00 pm	Stargazing Lecture Online Event An Insider's Look Behind Science Headlines Sarah Blunt, PhD Candidate, Department of Astronomy, Caltech,

Wednesday, February 3
4:00 pm - 5:00 pm	Astronomy Colloquium Online Event TBD Francois Combes, Professor, Paris Observatory, College de France,

Thursday, February 4
4:00 pm - 5:00 pm	Physics Colloquium Online Event Pushing the limits of hydrodynamics Pavel Kovtun, University of Victoria,

Friday, February 5
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event TBD Clay Cordova, University of Chicago,
12:00 pm - 1:00 pm	Special Seminar in Computing and Mathematical Sciences Online Event The Measurement and Mismeasurement of Trustworthy ML Sanmi (Oluwasanmi) Koyejo, Assistant Professor, Department of Computer Science, University of Illinois at Urbana-Champaign,
2:00 pm - 3:00 pm	TAPIR Seminar Online Event Cosmic rays and the origin of life Noémie Globus, Joint Postdoctoral Scholar, CCPP & CCA, NYU & Flatiron Institute,

Wednesday, February 10
12:00 pm - 1:00 pm	Astronomy Colloquium Online Event Stellar Interactions and Transients Silvia Toonen, Assistant Professor, Anton Pannekoek Institute, University of Amsterdam,

Thursday, February 11
4:00 pm - 5:00 pm	Physics Colloquium Online Event Quantum Field Theory and Beyond Nathan Seiberg, Institute for Advanced Study,
4:00 pm - 5:45 pm	Diverse Minds Seminar Online Event Topic to be announced Dr. Kafui Dzirasa, K. Ranga Rama Krishnan Associate Professor at Duke University with appointments in the Departments of Psychiatry and Behavioral Sciences, Neurobiology, Biomedical Engineering, and Neurosurgery.,

Friday, February 12
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event TBD Lakshya Bhardwaj, Oxford University,
2:00 pm - 3:00 pm	TAPIR Seminar Online Event Title to be announced Maria Okounkova, Research Fellow, Center for Computational Astrophysics, Flatiron Institute,

Tuesday, February 16
1:00 pm - 2:00 pm	IQI Weekly Seminar Online Event TBA Eduardo Martin-Martinez, Associate Professor, University of Waterloo,

Wednesday, February 17
12:00 pm - 1:00 pm	Caregivers' Group Meeting Online Event
4:00 pm - 5:00 pm	Astronomy Colloquium Online Event TBD Tim Bedding, Professor, Sydney Institute for Astronomy, University of Sydney,
5:00 pm - 6:00 pm	Watson Lecture - What Cosmic Fireworks Unveil About the Universe Online Event Mansi Kasliwal, Assistant Professor of Astronomy, Division of Physics, Mathematics and Astronomy, Caltech,

Thursday, February 18
4:00 pm - 5:00 pm	Physics Colloquium Online Event TBD Philip Kim, Harvard University,

Friday, February 19
9:00 am - 10:00 am	TAPIR Seminar Online Event Title to be announced Nicholas Stone, Assistant Professor, Theoretical Astrophysics, The Racah Institute of Physics, ,
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event TBD Irene Valenzuela, Harvard University,

Tuesday, February 23
10:00 am - 11:15 am	Chemical Physics Seminar Aleksandra Foltynowicz, Associate Professor and Head f the Optical Frequency Comb Spectroscopy Group, Department of Physics, Umea University,

Thursday, February 25
4:00 pm - 5:00 pm	Physics Colloquium Online Event On Quantum Information Science Enabled Discovery for High Energy Physics Cristian Peña, Caltech,

Friday, February 26
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event TBD Sebastian Mizera, IAS,
2:00 pm - 3:00 pm	TAPIR Seminar Online Event Title to be announced Max Gronke, Hubble Fellow, Department of Physics and Astronomy, Johns Hopkins University,

Tuesday, March 2
4:00 pm - 5:00 pm	Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Gaurav Chopra, Assistant Professor, Analytical and Physical Chemistry, Purdue University,

Thursday, March 4
4:00 pm - 5:00 pm	Physics Colloquium Online Event TBD Ronald Fernando Garcia Ruiz, MIT,

Friday, March 5
2:00 pm - 3:00 pm	TAPIR Seminar Online Event Title to be announced Federico Cipolletta, Postdoctoral Researcher, School of Mathematical Sciences, Rochester Institute of Technology,

Tuesday, March 9
4:00 pm - 5:00 pm	Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Monica Olvera de la Cruz, Lawyer Taylor Professor of Materials Science and Engineering, Chemistry and (by courtesy) Chemical and Biological Engineering, Physics and Astronomy, Materials Science and Engineering Chemical and Biological Engineering, Northwestern University,

Wednesday, March 10
4:00 pm - 5:00 pm	Astronomy Colloquium Online Event TBD Risa Wechsler, Professor of Physics, Stanford University,
5:00 pm - 6:00 pm	Watson Lecture - Perseverance on Mars Online Event Kenneth A. Farley, W.M. Keck Foundation Professor of Geochemistry, Division of Geological and Planetary Science, Caltech,

Thursday, March 11
4:00 pm - 5:00 pm	Physics Colloquium Online Event TBD Manuel Endres, Caltech,

Friday, March 12
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event TBD Douglas Stanford, Stanford University,

Tuesday, March 16
11:00 am - 12:00 pm	Chemical Physics Seminar Online Event Laura Gagliardi, Richard and Kathy Leventhal Professor, Department of Chemistry, University of Chicago,

Friday, March 19
2:00 pm - 3:00 pm	TAPIR Seminar Online Event Title to be announced Zorawar Wadiasingh, Postdoctoral Fellow, Universities Space Research Association, NASA Goddard Space Flight Center,