Describes what is known about Mercury from the photographs taken by Project Mariner.

Describes the migratory patterns of birds, butterflies, locusts, spiders, bats and geese, and includes information about some of the seeds and fruits that also ride the wind.

Why is it important tochew your food? Can you guess how long it takes for food to travel through your body? Could you possibly have twenty feet of small intestines? Where does that bad-smelling gas come from? Your digestive system is out of sight and out of mind -- until things don't go right. Then you may wonder how these important organs work! You'll find the answers in Seymour Simon's smooth, well-organized, and fascinating introduction to the...

A guide to collecting and identifying different kinds of rocks and minerals.

Surveys findings on Brachiosaurus, Diplodocus, and four other examples of the largest dinosaurs, including the locations of the discoveries and explanations of their names.

Describes, in text and photographs, the physical characteristics, habits, and natural environment of various species of snakes.

Discusses where and how hurricanes are formed, the destruction caused by legendary storms, and the precautions to take when a hurricane strikes.