In just a single lifetime, humans have changed the face of the planet on a scale unimaginable to our predecessors. Discovery Channel’s ‘Generation Earth,’ February 23 at 8 p.m., charts the epic extent of this redesign for the first time. The host, Dallas Campbell, travels the globe, visiting the largest and most ambitious engineering projects, exploring the power of human ingenuity and the making of the modern world. Throughout the series, he undertakes some extraordinary feats – from cleaning the windows of the world’s tallest building - the Burj Khalifa in Dubai, to scuba-diving in raw sewage in Mexico City, in order to unblock the turbines driving the mega-city’s failing sewage system. He also flies a replica of the Wright Brother’s glider from 1902, paraglides over the world’s largest greenhouse array and travels to a cosmodrome on the desert steppes of Kazakhstan, to witness a new age of space travel.