It's not your imagination: Earth is getting warmer. Global warming is perhaps the most prominent environmental issue of the past decade. Award-winning writer Laurence Pringle describes the causes of
The creators of Sharks! Strange and Wonderful introduce a variety of whales and describe the efforts to save these magnificent mammals from extinction--the largest mammals on Earth.
The little-known life of York, the African American slave owned by William Clark, and his contributions to the success of the Lewis and Clark expedition are examined in this carefully crafted Society
