Imagine exploring the most extreme parts of our amazing planet-trekking through the driest desert, climbing the snowiest mountaintops, and diving to the deepest regions of the ocean floor. Seymour Simon, the dean of children's science non-fiction, investigates Earth's biggest and smallest plants and animals, deepest and coldest environments, and most severe weather. These mind-bending facts and photographs invite readers on an exciting, and sometimes unbelievable, scientific expedition of Earth's most amazing records.