In CARS ON MARS readers can follow the course of NASA's Mars Exploration Rover (MER) mission as twin rovers Spirit and Opportunity explore the Red Planet. Learn how scientists determined that there was once water on Mars and how the Earthbound NASA team resolved problems with the rovers from afar in order to prolong the mission, which continues today. The author provides insight into scientists' quest to discover whether life may have or still might...

"READY-OR-NOT-HERE-I-COME." The boy listens. The girl is getting closer. Suddenly, there's another sound. A droning buzz. Something else is looking for the boy. The seeker is a mosquito, Culex pipiens, and her search is a matter of life and death. She must find food-blood-to nourish the hundreds of tiny eggs inside her body. Black-and-white photographs show the children's game of hide-and-seek, while astonishing micrographs show Culex and her world...

While one tractor sits on the grass, out of gas, increasing numbers of other vehicles, from two airplanes to ten bicycles, fill the backyard with adventure.

Describes the numerous plants and animals that live in the Brazilian rain forest and their ecological and economic importance.

Examines the plants and animals of Hawaii, discussing such elements as species diversity, endangered species, and conservation efforts.