Puffball season is nearing its end, but some Quebecers will be eating their mushroom for daysMélanie Greffard and her husband usually head out to a nearby forest or the Eastern Townships to forage for mushrooms. So the pair had quite the surprise when they stumbled upon a Calvatia gigantea — a giant puffball the size of two basketballs in their backyard near downtown Quebec City last week. It weighed in at nearly six kilograms. "At first, it's almost kind of scary, like, 'What is this thing?'" Greffard said, laughing. "We were really impressed with how big it was." Giant...