Walker, Sally M

Describes work, machines, inclined planes, gravity and friction, and wedges in everyday surroundings, and presents experiments that explain how they work.

Describes the 1938 discovery of the coelacanth, a fish previously believed to be extinct, and subsequent research about it.

Explains what fossils are, how they form, and how they are found and studied, and presents pictures of several examples.

An introduction to light that explores how light is made, how light interacts with matter, what causes light to bend and bounce, how light impacts color, and how light and heat influence each other.

An introduction to heat that uses experiments and easy-to-follow text to help readers understand the principles of heat, how it is made, how different kinds of matter conduct heat, and other related topics.

Describes the life of Mary Anning, who discovered many of the best and most complete fossils in nineteenth-century England, yet received little credit for her work.

Explores the discovery and identification of the Kennewick Man, a nine thousand year old skeleton whose remains where found in a river bed in Washington State in 1996.

Reports on the work of forensic scientists who are excavating grave sites in James Fort, in Jamestown, Virginia, to understand who lived in the Chesapeake Bay area in the 1600s and 1700s; and uncovers the lives of a teenage boy, a ship's captain, a colonial officer, an African slave girl, and others.

Provides an account of the disaster that occurred on December 6, 1917, when two ships carrying munitions and relief supplies to Europe collided, causing an explosion that leveled the towns of Halifax and Dartmouth and resulted in the deaths of nearly two thousand people.