People stop in front of a camera that detects infrared light in Vancouver

People stop in front of a camera that detects infrared light and produces an image showing warmer body areas appearing white and yellow and colder ones blue or green, at Telus World of Science, during the first of four days of free admission for essential workers and their families, in Vancouver, on Thursday, July 23, 2020. The facility has instituted occupancy limits, timed entry online ticket sales and visitors aged six and older are required to wear a face mask. They are scheduled to reopen to the general public on August 1st. THE CANADIAN PRESS/Darryl Dyck