From their first appearance on earth the dinosaurs constantly overwhelmed our mammalian ancestors. But their time was destined to end. The series explores the epic history of evolutionary challenges to mammals to reveal how they finally achieved predominance over other species in the world after dinosaurs and how the present ecosystem developed through meteorite impact, volcanic activities, and tectonic movements. Life on earth has always striven for survival of species. Our mammalian ancestors also developed their own mechanisms to protect their offspring. They survived many crises, which even offered opportunities for some mammalian species to thrive and take part in the coming golden age of mammals.