Discovery readers

Discusses how the practice of using coins and paper money evolved and explains the circle money travels as it is earned, saved, and spent.

Simple text and pictures explain the winter survival techniques of various animals, including whales, bears, frogs, bees, foxes, and chipmunks.

Discusses dinosaurs and different theories regarding their extinction, including climate changes, starvation, cosmic rays, and an asteroid collision with the earth.

Explains the cycle of evaporation, condensation, and precipitation that provides fresh water to the earth and describes how this supply is brought to people's homes.

Explains the cycle of evaporation, condensation, and precipitation that provides fresh water to the earth and describes how this supply is brought to people's homes.

Examines the different strategies which animals use to stay alive during cold weather, including migration, hibernation, and changing color.

Presents the various theories of dinosaur extinction, inviting readers to make their own conclusions.