Susan Heinrichs Gray

Presents general information about paleontologists, what they learn about prehistoric animals and vegetation by studying them.

Explains what geology is, shows how the Earth itself and rocks change, and looks at how geologists study the polar regions and outer space.

Describes the discovery and study of the fossilized remains of dinosaurs.

Describes the fossilized remains of dinosaur teeth and what can be learned from them.

Contains experiments that explore motion and the forces that cause motion, covering such topics as inertia and friction.

Do basset hounds have back problems? Do pugs snore? Domestic dogs takes readers into the fascinating world of dogs for a close look at some of the most popular breeds. Simple, engaging text and bright photos introduce young readers to each breed's origins, appearance, personality, and quirks. There's even breeding specific advice for living with these lovable creatures. Readers everywhere will delight in learning about the dogs that add so much to...

Describes the physical features of an ocean, its community of plants and animals, and environmental threats.