WHY IS THE arctic so cold? How do polar bears cross thin ice? How did people learn to survive in that harsh climate? Find out the answers to these questions and more in Magic Tree House Research Guide:Polar Bears and the Arctic,Jack and Annie's guide to the arctic. This is the nonfiction companion toPolar Bears past Bedtime. From the Trade Paperback edition.Osborne, Mary Pope is the author of 'Polar Bears and the Arctic ', published 2007 under ISBN 9780375932229 and ISBN 0375932224.