Mary Batten

When animals or plants invade a new habitat, they can upset the delicate balance of the ecosystem. Explores how and why plants and animals enter ecosystems to which they are not native, as well as the consequences of these invasions for other animals, plants, and humans.

"Over millions of years, organisms in Antarctica--one of the most extreme environments on Earth--have evolved in amazing ways that enable them to thrive on the ice, in the ice, and under the ice. How is climate change affecting the creatures that live in this frozen world? Even in the intensely cold, windy, and dry environment of Antarctica, a wide variety of wildlife--from the massive swarms of krill in the Southern Ocean to the throngs of penguins...

Describes how a wolf pup grows through its first year with its siblings and other members of its pack.