The Arctic and Antarctica are two of the most extreme environments in the world. They are freezing cold, wind-blown, lip-cracking dry, and pitch-black for half

"Explains why the Arctic and Antarctic are extreme environments and examines how polar bears, penguins, and other animals have adapted to the cold"--Provided by

Exploring the desert is an unforgettable experience. Most days there is not a cloud to shade the blazing sun. Within minutes, exposed skin shows signs of sunbur

"Explains why the ocean depths are extreme environments and examines how leatherback turtles, giant squids, and other animals have adapted to the harsh conditio

"Explains why caves are extreme environments and examines how vampire bats, giant water bugs, and other animals have adapted to the harsh conditions"--Provided