Explore how extreme climate changes have transformed our world! From flattening mountains to creating our favorite vacation spots, we reveal how massive sheets of ice formed our present-day landscapes. We also uncover how the ice ages' harsh environments shaped the lives of our ancestors and who we are today. Earth's global climate shifts are far from over -- join our experts as they predict when the next ice age will come! Bonus feature: L.A. 10,000 BC: Ever wonder how our prehistoric ancestors survived in a world of giant, bloodthirsty beasts? Using meticulously engineered simulated animals and top stunt performers, we ditch the sophistication of modern Los Angeles to get dirty in L.A. 10,000 B.C.