If the title seems familiar, that’s because the Perimeter Institute for Theoretical Physics (PI) had a November 2024 presentation also by Dr. Katie Mack with an identical title. Here’s more from an August 29, 2025 PI event notice (received via email),
How the Universe Ends: Dr. Katie Mack
Tuesday, September 16 [2025] at 7:00 pm ET
You’re invited to an exclusive public lecture with Dr. Katie Mack, a theoretical astrophysicist exploring a range of questions in cosmology, the study of the universe from beginning to end. She currently holds the position of Hawking Chair in Cosmology and Science Communication at the Perimeter Institute for Theoretical Physics, where she carries out research on dark matter and the early universe and works to make physics more accessible to the general public.
The Big Bang theory tells the story of the beginning of the Universe, our cosmic home for the last 13.8 billion years. But how does the story end? She’ll share what modern astrophysics tells us about the ultimate fate of the cosmos, and what the catastrophic destruction of all reality would look like to anyone still around to see it.
Don’t miss out! Free tickets to attend this event in person will become available on Tuesday, September 2, [2025] at 9 am ET.
If you didn’t get tickets for the lecture, not to worry – you can always catch the livestream on our website or watch it on YouTube after the fact.

There’s more on the event registration page,
Date and time
Starts on Tuesday, September 16 [2025] · 6:45pm EDT
Location
Centre for International Governance Innovation 67 Erb Street West Waterloo, ON N2L 6C2
Agenda
6:00 p.m.
Doors Open
CIGI’s main floor foyer will be open for ticket holders, with researchers available to answer science questions until the talk begins.
6:45 p.m. – 6:45 p.m.
Doors Close
Auditorium doors close to ensure all guests have enough time to enter and be seated by our ushers.
7:00 p.m. – 8:00 p.m.
Public Talk
The talk will begin at 7:00 PM, offering a live stream for virtual attendees. This will include a full presentation in the CIGI Auditorium as well as a Q&A session.
8:00 p.m. – 8:30 p.m.
CIGI Foyer (Optional)
After the talk, head to the CIGI foyer to mingle with other attendees and meet the speaker.
…
About the Speaker
Dr. Katie Mack is a theoretical astrophysicist exploring a range of questions in cosmology, the study of the universe from beginning to end. She currently holds the position of Hawking Chair in Cosmology and Science Communication at the Perimeter Institute for Theoretical Physics, where she carries out research on dark matter and the early universe and works to make physics more accessible to the general public. She is the author of the book “The End of Everything (Astrophysically Speaking)” and has written for a number of popular publications, such as the New York Times, Washington Post, Scientific American, Slate, Sky & Telescope, BBC Science Focus, and Cosmos magazine. You can read more about Dr. Mack and her work at www.astrokatie.com.
Tickets
Registration to attend the event in person will open on Tuesday, September 2, at 9:00 AM EDT. Tickets are free and must be reserved through Eventbrite, as there is no on-site box office.
TICKETS ARE VALID UNTIL 6:45 PM THE DAY OF THE EVENT.
The talk will also be live-streamed on our YouTube channel at 7:00 PM EDT: https://www.youtube.com/@PIOutreach
Better the second time around?

