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April 2026

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Tuesday, April 28th, 2026
4:00pm – 5:00pm
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Ulric B. and Evelyn L. Bray Social Sciences Seminar

Baxter B125
The Donor Dilemma
B. Pablo Montagnes, Associate Professor of Data & Decision Sciences and Political Science, Emory University,
4:15pm – 5:15pm
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QCSA Speaker Event: John Preskill @ Caltech

Lauritsen 269
John Preskill, Professor, Caltech,
5:30pm – 7:15pm
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Armenian Music Lecture and Dinner | Komitas and the Echo of a Vanished World

Dabney Hall, Lounge
Dr. Vatché Mankerian,
7:00pm – 9:00pm
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Caltech Tai Chi Club - Free Tai Chi Class

Hameetman Center 220 - Multipurpose Room
Wednesday, April 29th, 2026
8:00am – Ongoing
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Midterm Examination Period

10:00am – 11:00am
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Consciousness & Reality (C&R) 2025-26 Series NEUROBIOLOGICAL ORIGINS OF VISUAL AWARENESS

10:00am – 11:00am
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Deans & Donuts - Spring Midterm Study Break

Center for Student Services, Lobby
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Water-Wave Scattering Amplitudes and the Waterhedron
Francesco Calisto, Caltech,
12:00pm – 2:00pm
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Caltech Giving Day: Give Back. Get Involved. Make an Impact.

Hameetman Center Patio
12:00pm – 1:00pm
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Logic Seminar

Online Event
The Borel dichromatic number
Tonatiuh Matos Wiederhold, PhD Candidate, Department of Mathematics, University of Toronto,
12:00pm – 1:00pm
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Seismo Lab Brown Bag Seminar

South Mudd 254
Monica Kohler, Research Professor of Mechanical and Civil Engineering, Caltech,
12:00pm – 2:00pm
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Weekly Composting Tabling Event

Red Door Cafe
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
A paradigm shift in the landscape of Type Ia supernova progenitors
Ken Shen, Research Specialist, Department of Astronomy, UC Berkeley,
4:00pm – 5:00pm
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Environmental Science and Engineering Seminar

South Mudd 365
Thermodynamic Control of Hydroclimate Change in the Western United States and Its Consequences
Alex Hall, Director, Institute of the Environment and Sustainability; Professor, Atmospheric and Oceanic Sciences; Faculty Director, Sustainable LA Grand Challenge Institute of the Environment and Sustainability, UCLA,
4:00pm – 5:00pm
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Materials Science Research Lecture

Noyes 147 (J. Holmes Sturdivant Lecture Hall)
Probing Nanoscale Structures and Magnetism: An Introduction to Small-Angle Neutron Scattering (SANS)
Lisa Debeer-Schmitt, PhD, Senior R&D, Neutron Sciences Directorate, Oak Ridge National Laboratory,
4:00pm – 5:00pm
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Organic Chemistry Seminar

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Design and Application of New Pericyclic Strategies
Christopher Newton, Assistant Professor, Department of Chemistry, University of Georgia,
7:30pm – 8:30pm
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POSTPONED: Watson Lecture - Sarkis Mazmanian

Beckman Auditorium
Sarkis Mazmanian, Luis B. and Nelly Soux professor of microbiology; Merkin Institute Professor,
Thursday, April 30th, 2026
10:00am – 11:00am
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PhD Thesis Defense

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Principles of Proton-coupled Electron Transfer Mediator Design
Enric Adillon, Graduate Student, Chemistry (Peters Group), Caltech,
11:00am – 12:00pm
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Mechanical and Civil Engineering Seminar

Gates-Thomas 135
Robots That Learn To Model The World By Playing
Anirudha Majumdar, Associate Professor, Mechanical and Aerospace Engineering (MAE) department, Princeton University,
12:00pm – 2:00pm
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Midterms Decompression: Tie-Dye Afternoon

Center for Student Services, Large Tent
12:05pm – 1:00pm
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Observational Cosmology Seminar

Cahill 370
Precision Redshifts for SPHEREx Cosmology
Gemma Huai, Graduate student, Division of Physics, Mathematics and Astronomy, Caltech,
2:30pm – 3:30pm
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Caltech/USC Joint Algebra and Geometry Seminar (1/2)

Linde Hall 187
TBD
Dan Kaplan, Assistant Professor, Department of Mathematics, Long Beach State,
4:00pm – 5:00pm
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Caltech/USC Joint Algebra and Geometry Seminar (2/2)

Linde Hall 187
Tensor-generation on toric varieties
Daigo Ito, PhD Candidate, Department of Mathematics, UC Berkeley,
4:00pm – 5:00pm
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Chemistry Seminar

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Finding Chemical Insight in the Maze of Mass Spectra with Machine Learning
Daniil Boiko, Ph.D., Co-Founder, onepot.AI,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
A new proof of the Arithmetic Siegel--Weil formula
Yu Luo, PhD Candidate, Department of Mathematics, University of Wisconsin-Madison,
4:00pm – 5:00pm
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Physics Colloquium

Online and In-Person Event
Optical atomic clocks in the age of quantum information processing
Nelson Darkwah Oppong, Assistant Professor of Physics, PMA, Caltech,
4:00pm – 5:00pm
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Social Sciences History Seminar

Baxter B125
Immigrants' Wages, Integration and New Arrivals - Evidence from the Quota Acts of 1921 and 1924
Katherine Eriksson, Associate Professor, Department of Economics, UC Davis,