ERRATA

* In the section on penguins, the author writes: "When they're old enough to swim and fish, the young penguins will face new dangers, this time from seals and polar bears." She apologizes for the error in this sentence. Polar bears live in the Arctic, penguins in the Antarctic. Penguins face dangers from seals, killer whales, and several predatory birds. Seals face dangers from polar bears.