Doors Open Waterloo Region

From the Doors Open Waterloo Region Facebook Group: 

Registration is now open for free tickets to Doors Open at the new Stephen Hawking Centre at Perimeter Institute, Sunday, September 18. Follow this link to register. 

Free tickets to the Old Post Office, Perimeter Institute’s other participating Doors Open Waterloo Region 2011 site, Saturday, Sept. 17, will be available at the "Events" listing on the same website the week of August 22.