Season 44
Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.
Killer Volcanoes
How has China’s magnificent Forbidden City withstood centuries of earthquakes?
Secrets of the Forbidden City
A team of experts rebuild an ancient battle chariot to help uncover its design secrets.
Chinese Chariot Revealed
Engineers race to build a massive dome to contain the crumbling remains of the reactor.