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 nonfiction, 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.