One of the ancient world's most iconic buildings, the Colosseum is a monument to Roman imperial power and cruelty. Its graceful lines and harmonious proportions concealed a highly efficient design and advanced construction methods that made hundreds of arches out of 100,000 tons of stone. In its elliptical arena, tens of thousands of gladiators, slaves, prisoners, and wild animals met their passings. Ancient texts report lions and elephants emerging from beneath the floor, as if by magic, to ravage gladiators and people condemned to passing. Then, just as quickly, the Colosseum could be flooded with so much water that ships could engage in sea battles to the delight of the crowd. Now, archaeologists and engineers are teaming up to recreate a 25-foot lifting machine and trap door system capable of releasing a wolf into the Colosseum's arena for the first time in 1,500 years. Do they have what it takes to replicate the innovation and ingenuity of the Romans?
s42e01 - Vaccines Calling the Shots
s42e02 - Rise of the Hackers
s42e03 - Why Planes Vanish
s42e04 - Surviving Ebola
s42e05 - Ben Franklin's Balloons
s42e06 - First Air War
s42e07 - Bigger Than T. rex
s42e08 - Emperor's Ghost Army
s42e09 - Killer Landslides
s42e10 - First Man on the Moon
s42e11 - Big Bang Machine
s42e12 - Sunken Ship Rescue
s42e13 - Sinkholes-Buried Alive
s42e14 - Colosseum - Roman Death Trap
s42e15 - Petra - Lost City of Stone
s42e16 - Hagia Sophia: Istanbul's Ancient Mystery
s42e17 - The Great Math Mystery
s42e18 - Invisible Universe Revealed
s42e19 - Nazi Attack on America
s42e20 - Lethal Seas
s42e21 - Chasing Pluto
s42e22 - Nuclear Meltdown Disaster
Seen in more than 100 countries, NOVA is the most watched science based television series in the world and the most watched documentary series on PBS. It is also one of television's most acclaimed series, having won many major television awards, most of them many times over.