Discusses the history of human ideas about Mars, its geology and moons, missions to the Red Planet, and the possibility of life on Mars.

A comprehensive look at comets, from man's earliest observations of "hairy stars," to recent sightings of Comet Shoemaker-Levy 9 and Halle-Bopp, to future space missions to study comets in the outer solar system.

Describes the discovery and observation of the planet Neptune and what has been learned about it, particularly from the Voyager spacecraft mission.

Looks at the history and discovery of the planet Uranus.

Erich Burger was on safari in Africa when a small, brown fly bit him. Soon after, he began experiencing a high fever, severe aches, and horrible fatigue. He went to the emergency room and was diagnosed with a life-threatening disease caused by bloodsucking tsetse flies! Would he survive his dangerous encounter with a tiny fly? Read Erich's harrowing tale of survival, and learn all about flies and the deadly diseases they carry in this engrossing new...

What has one head, sometimes has tails, and orbits the Sun? A comet! These giant balls of ice, mixed with rock and dust, orbit the Sun. When they are very far from it, they have no tails. When they get closer to the Sun, they heat up and give off a cloud of gases and dust--and form tails. Early readers will be taken on a journey through outer space in simple yet captivating text as they learn these and other fascinating facts about comets. Each 24-page...

Karolina Paniagua was horribly sick and no one could figure out why. At first, Karolina came down with a high fever and joint pain. Over the next couple of weeks, she could barely walk. A doctor decided to test Karolina for Chagas disease, a lethal illness spread by the deadly kissing bug. The test came back positive-Karolina was stunned. Read Karolina's harrowing tale of survival, and learn all about kissing bugs and the deadly disease they carry...