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Meet the young activists who are using their voices and minds to fight climate change. Did you know that the past five years have been the hottest...

Imagine exploring the most extreme parts of our amazing planet—trekking through the driest desert, climbing the snowiest mountaintops, and diving t...

Imagine exploring the most extreme parts of our amazing planet-trekking though the driest desert, climbing the snowiest mountaintops, and diving to...

Award-winning science writer Seymour Simon explores the Red Planet through fascinating facts and amazing full-color photographs. Readers will learn...