decay

Inside the battle to preserve the underwater ghosts of Ontario's Great Lakes

Inside the battle to preserve the underwater ghosts of Ontario's Great Lakes

Archeologists, historians and divers are trying to digitally capture more than 1,000 shipwrecks at the bottom of the Great Lakes before they become unrecognizable after a combination of invasive mussels and climate change have accelerated their deterioration at an alarming rate. The Great Lakes region is known among diving circles as one of the best places in the world to explore shipwrecks because the cold, fresh water offers ideal conditions for their preservation, even in shallow water. 

After a decade of cavities, will Calgary put fluoride back in its water supply?

After a decade of cavities, will Calgary put fluoride back in its water supply?

The wisdom of public health authorities has been on everyone’s mind, this year and last. In Calgary this fall, it will be on the ballot. Voters will be asked during October’s civic election whether they want to resume adding fluoride to the water supply. City council had ended the practice a decade ago, undoing voters’ decisions in the fifth (1989) and sixth (1998) plebiscites in the city’s long and winding history with water-borne anti-cavity intervention.