Whale Haven in Chile
Blue whales survived despite commercial whaling; now threatened by industry.
The Science and Survival of a Species
They are the biggest animals on Earth — more than 100 feet long and more than 100 tons — bigger than the biggest dinosaur. But we know less about them than most creatures on the planet because they spend 98 percent of their lives underwater, and when they do surface, only a fraction of their mass can be seen. (Jeffrey Kofman/ABC News)
