Fifteen-year-olds Nina and Oli come from different words--she is a Lipan Apache living in Texas and he is a cottonmouth from the Reflecting World--but their lives intersect when Oli journeys to Earth to find a cure for his ailing friend and they end up helping each other save their families.

In Edgar Rice Burroughs' At the Earth's Core the narrator tells of his travels in the Sahara where he encounters David Innes, the pilot of an amazing vehicle and the owner of a remarkable story. It turns out his experimental "iron mole" cannot be turned off-course and it drills itself 500 miles through the earth's crust, breaking through into an unknown interior world. 1914's At the Earth's Core is the first of Burroughs' series exploring

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"Earth is one of eight planets and the only one with one moon. Its seven continents are made up of many different types of landforms, and they are surrounded by the oceans. Includes science and reading activities and a word list."--

While on the White Feather Flier, children learn to do what they can to help save the environment, including creating clean water for people to drink and taking pollution out of the ocean

Collects poetry written by Lakota students at Red Cloud Indian School in South Dakota on such topics as the history of oral tradition, the struggles of everyday life, and their personal connections to the natural world.

Set in the challenging terrain of Ice Age Europe that millions of Jean Auel’s readers have come to treasure, The Mammoth Hunters is an epic novel of love, knowledge, jealousy, and hard choices—a novel certain to garner Jean Auel even greater acclaim as a master storyteller of the dawn of humanity.
Ayla, the independent heroine of The Clan of the Cave Bear and The Valley of Horses, sets out from...

Follows polar bear, elephant, and humpback whale families on their journeys and struggles within their environments.

When friends Jack, Quint, June, and Dirk realize they read every issue of their favorite comic, Z-Man, the friends decide to write and illustrate their own comic book.

"In the tradition of Elizabeth Kolbert and Barry Lopez, a powerful, poetic and deeply absorbing account of the "lung" at the top of the world. For the last fifty years, the trees of the boreal forest have been moving north. Ben Rawlence's The Treeline takes us along this critical frontier of our warming planet from Norway to Siberia, Alaska to Greenland, to meet the scientists, residents and trees confronting huge geological changes. Only the hardiest...

Presents facts about the planet Earth and describes its geography, physics, and geology.