Sally M. Walker

Discusses the processes used by scientists to discern the identity of the Kennewick Man and what this nine thousand-year-old skeleton revealed about the arrival of humans in North America.

Electricity powers lights, computers, and television sets. But have you seen how electricity can make objects stick together? Or make other objects pull apart? Now you can! Explore electricity with the fun experiments you'll find in this book. This series sheds light on a key science question; How Does Energy Work? Hands-on experiments, interesting photos, and useful diagrams will help you find the answer!

Looks at what magnetism is, and examines how magnets interact with different types of matter and with the Earth's magnetic field.

"The story of the near-extinction and recovery of the American Chestnut tree."-- American Chestnut trees were once plentiful in North America's eastern forests. They towered up to one hundred feet tall, providing food and shelter for people and animals alike. To many, life without the chestnut was unimaginable - until disaster struck in the early 1900s. What began in the bark of a few trees soon became an unstoppable killing force, traveling across...

Looks at what heat is, and examines how it interacts with different types of matter.

Eight-year-old Letty attempts to save her pet goose from marauding British soldiers in New Jersey during the Revolutionary War.

In the time when witches tiptoe about to have their Halloween fun, ancient Druscilla knows her creaking knees will prevent her from being sneaky and sets out to find a silent conveyance for herself, her cat, and her jack-o-lantern.

Describes the life and accomplishments of baseball star Jackie Robinson, who became the first African American in twentieth-century major-league baseball.