Calgary Herald Tuesday, May 06, 2003   Paulo da Costa chose Canada as his place of residence despite an encounter with a grizzly bear. Paulo da Costa will read from The Scent of a Lie at noon today at McNally Robinson Booksellers as part of the Commonwealth Writers Prize celebrations. Calgary author Paulo da Costa knows a thing or two about standing his ground — in the face of both critics and carnivores. His face-to-face with the carnivore came a dozen years ago on a hike in the Alberta Rockies. The Angola-born, Portugal-raised writer hit the trail alone for a bit of soul-searching as he struggled to decide whether to…