There's now a giant 500-tonne pendulum swinging above downtown Toronto

Canada's new tallest tower soars high over downtown Toronto, but how do you keep a 106-storey megatower from swaying in strong winds? An enormous pendulum has been installed atop the massive Pinnacle SkyTower - which recently claimed the title of Canada's tallest building with an immense height of 352 metres. The megaproject's designers, Hariri Pontarini Architects, have shared a behind-the-scenes…