Video Library

Since 2002 Perimeter Institute has been recording seminars, conference talks, public outreach events such as talks from top scientists using video cameras installed in our lecture theatres.  Perimeter now has 7 formal presentation spaces for its many scientific conferences, seminars, workshops and educational outreach activities, all with advanced audio-visual technical capabilities. 

Recordings of events in these areas are all available and On-Demand from this Video Library and on Perimeter Institute Recorded Seminar Archive (PIRSA)PIRSA is a permanent, free, searchable, and citable archive of recorded seminars from relevant bodies in physics. This resource has been partially modelled after Cornell University's 

Accessibly by anyone with internet, Perimeter aims to share the power and wonder of science with this free library.





Monday Jul 23, 2018
Abstract: From astronomical observations, we know that the state of the early universe
(just after the Big Bang) was extremely simple. This is surely an important clue about how
the universe began, but what exactly is it trying to tell us? I will explain our new answer to
this question: we think it is telling us that the universe before the bang is a kind of mirror
image of the universe after the bang (they are related by "CPT symmetry"). (Based on



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