Math Encounters

Now offering FREE, online sessions!

Click here for FREE Math Encounters videos

Math Encounters is MoMath’s popular free public presentation series celebrating the spectacular world of mathematics, produced with support from the Simons Foundation.  For further information, call the National Museum of Mathematics at 212-542-0566 or email

Next up

“The Structure of Space: Measuring the Shape of the Universe”

with David Spergel

Wednesday, July 7 at 4:00 pm and 7:00 pm ET (New York)

Online and in person!

Is the universe infinite or finite?  Will it expand forever or collapse in a hot Big Crunch?  And what is its shape?  Join David Spergel, Director of the Center for Computational Astrophysics, Flatiron Institute, as he introduces geometry and topology, the mathematical concepts used to answer these questions.  Learn how observations of the microwave background (the leftover heat from the Big Bang) have revealed the universe’s shape and can help predict its destiny.

Special introduction by Janna Levin, Claire Tow Professor of Physics and Astronomy at Barnard College of Columbia University.

On Wednesday, July 7, you can join Math Encounters in person at the Museum (11 East 26th Street) — or online by participating in a livestream broadcast of the event.

Photography notice

By registering for a Math Encounters presentation, you agree that you may be photographed or videotaped by Museum staff and associates.

Books by the speakers

We are happy to offer books edited or authored by Math Encounters speakers through our online shop.

Math Encounters available on YouTube and DVD

Math Encounters presentations are generally posted to our YouTube page within 1-2 months of filming.  Due to copyright issues, some presentations may not be reproduced on the internet.  Presentations posted online are also available for purchase via our online shop.  Click here to purchase yours today!

Previous Math Encounters presentations

Presented by the Simons Foundation and the National Museum of Mathematics

Please note that all children under the age of 16 must be accompanied by an adult.