"Marine biologist Brent Hughes discovered a surprising connection between sea otters and sea grass at an estuary in northern California. Follow science in action as Hughes conducts the research that led to this major discovery."--

Describes the climate, soil, plants, and animals of North American deserts and the ways in which the plants and animals depend on each other and their environment to survive.

Explains the flora and fauna that survive in America's prairies and grasslands.

Takes readers on a walk through a forest of trees that lose their leaves in the fall, showing examples of how the animals and plants depend on each other and their environment to survive.

Explores different kinds of food eaten by certain animals and the special teeth or other tools they have for eating that food, as well as some of the ways plants avoid being eaten.

Introduces several of the ocean's species, provides profiles of creatures, from dolphins and sharks to sea otters and penguins, while sharing facts about their characteristics, diets, and habitats.

Describes the 1977 journey of the submersible ship Alvin, in which three explorers saw, for the first time, the strange marine life that dwells in hydrothermal vents and other mysteries of the deep sea.