Newswise — Feb. 18, 2016 (Waterloo, Ontario, Canada) – The ordinary atoms that make up our known universe – from our bodies and the air we breathe to planets and galaxies – constitute just five percent of all matter and energy in the cosmos.

What’s the rest? Dark matter and dark energy, the invisible stuff occupying most of the universe, are among the most vexing puzzles in physics today.

On March 2, join theoretical cosmologist Katherine Freese as she discusses the theories physicists are employing to decode these pervasive but elusive forms of matter and energy.

The lecture, titled “The Dark Side of the Universe,” is part of the Perimeter Institute Public Lecture Series, and will be webcast live Wednesday March 2 at 7 PM EST on the Perimeter Institute website and via partner organizations.

Freese’s research touches on a wide range of topics in theoretical cosmology and astroparticle physics. She is particularly interested in identifying the dark matter and dark energy, as well as building a successful model for the early universe immediately after the big bang.

The George E. Uhlenbeck Professor of Physics at the University of Michigan, Freese also recently completed a term as the Director of Nordita – the Institute for Theoretical Physics of the Nordic countries in Stockholm. She has been a fellow or visiting professor at physics organizations around the world, including the Kavli Institute for Theoretical Physics, Massachusetts Institute of Technology, CERN, the Max Planck Institute, and Perimeter Institute. Freese is also a Fellow of the American Physical Society.

Following her talk, Freese will answer questions from the online and in-house audience – including questions submitted prior to and during the talk via Facebook and Twitter (using the hashtag #piLIVE). Questions are welcomed from everyone – aspiring scientific explorers, school classes, physics buffs, and general science enthusiasts.

Click here to sign up for a reminder to tune-in to the live webcast.

View past PI Public Lectures and events, and find further details about PI’s research, training, and outreach activities at

________________________________________LIVE WEBCAST DETAILS• What: Katherine Freese, The Dark Side of the Universe• When: Wednesday, Mar. 2, 7 pm EST • Where: Live at Perimeter Institute, webcast online at http://www.perimeterinstitute.caClick here to sign up to receive an email reminder about the live webcast• Pose questions for Freese by tweeting @Perimeter using the hashtag #piLIVE• More info:

ABOUT PERIMETER INSTITUTEPerimeter Institute is the world’s largest research hub devoted to theoretical physics. The independent Institute was founded in 1999 to foster breakthroughs in the fundamental understanding of our universe, from the smallest particles to the entire cosmos. Research at Perimeter is motivated by the understanding that fundamental science advances human knowledge and catalyzes innovation, and that today’s theoretical physics is tomorrow’s technology. Located in the Region of Waterloo, the not-for-profit Institute is a unique public-private endeavour, including the Governments of Ontario and Canada, that enables cutting-edge research, trains the next generation of scientific pioneers, and shares the power of physics through award-winning educational outreach and public engagement.

FOR MORE INFORMATION, CONTACT:Eamon O’FlynnManager, Media Relationseoflynn[at]perimeterinstitute[dot]ca(519) 569-7600 x5071@Perimeter