If you haven't seen the new natural history galleries at the Royal Ontario Museum, it's high time you went. However admirable the dinosaurs, the local heroes are the mammals that roamed Toronto during past episodes of climate warming. They include antiques like the charmingly named stag moose that rambled through the open spruce forest of the last ice age. You'll also find the fossil of a new genus of deer, unearthed during a Bloor subway line extension in the 1970s. The animal was named Torontoceros after the place that was built, 12,000 years later, over its final resting place.