Putting the puzzle together bone by bone

You never know what will wash up in a place like Saanich, near Vancouver island's south coastwhich is great if you're a biology teacher. A few years back, Peter Demchuk, a Claremont Secondary School teacher, got hold of a dead porpoise. Then 18 months ago, he hit the mother lode: eight metres of grey whale, which after spending a year at the bottom of nearby Sooke basin, was already stripped of skin and blubber.