Looks at the worlds of Amelia Earhart, Jacques Cousteau, Marco Polo and other famous explorers, sharing real-life photographs of their equipment and personal possessions as well as objects they found.

Presents the life and accomplishments of the pioneering scientist who became the world's expert on chimpanzees.

I closed my eyes and took a breath, then I said, "Everything will be okay.", I let my breath out, slow but strong, pretending to blow dandelions away.

Some animals are big and some are small. Can you see the difference?

Grassland ecosystems can be found on nearly every continent. Countless animals and plants live in them. So what difference could the loss of one animal species make? Follow the chain reaction, and discover how important honey bees are.

Energy is a vital part of our lives. It powers our computer, lights our home, and moves our car. It also costs a lot of money and pollutes our environment. In Energy: 25 Projects Investigate Why We Need Power and How We Get It, kids ages 9–12 learn about the history and science of the world's energy sources, from nonrenewable fossil fuels such as oil and natural gas to renewable sources such as solar and wind power. Sidebars and fun trivia break...

A humorous look at American history.

In early 1968 the grisly on-the-job deaths of two African-American sanitation workers in Memphis, Tennessee, prompted an extended strike by that city's segregated force of trash collectors. Workers sought union protection, higher wages, improved safety, and the integration of their work force. Their work stoppage became a part of the larger civil rights movement and drew an impressive array of national movement leaders to Memphis, including, on more...