Huge. Ancient. Intelligent. And swimming into a museum near you. As the subject of the latest temporary exhibit at the Denver Museum of Nature & Science, whales practically sell themselves. “Everybody loves whales because they’re such cool animals,” said John Demboski, curator of vertebrate zoology at the museum. “They’re smart. They have language and dialects. They’re very social and usually live in family units. And they’re so huge: Some can weigh up to 190 or 200 tons.” In “Whales: Giants of the Deep,” visitors can see just how huge. The exhibit, which opens Oct. 10 and runs through Feb. 16, features 20 whale skulls and skeletons alongside interactive video presentations, models, high-tech games, cultural artifacts and kid-...