Hagia Sophia: Istanbul's Ancient Mystery
Examine Hagia Sophia’s seismic secrets, which have insured its survival through a dozen earthquakes.
Petra: Lost City of Stone
Follow an archaeologist and sculptors to learn how the people of Petra built their city of stone.
Colosseum: Roman Death Trap
Watch a team re-create a lifting machine and trap-door system to release a wolf into the Colosseum.
Sinkholes: Buried Alive
Sinkholes are examined. The collapses can be gradual.
Sunken Ship Rescue
Follow the epic operation to secure, raise, and salvage the Costa Concordia cruise ship
Big Bang Machine
Watch as CERN scientists prepare to restart the history-making Large Hadron Collider.
2/27/15 8:00 AM
2/27/15 2:00 PM
2/28/15 3:00 AM
3/1/15 1:00 AM
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