#1
S2E4
Chapter IV
Graham learns of a stone-shaping technique now lost to history, and explores how ancient Amazonians managed to thrive in an inhospitable rainforest.
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#2
S2E6
Chapter VI
At Mexico's Temple of the Sun, Graham experiences the extent of the Mayans' astronomical expertise and investigates their complex calendar system.
#3
S2E2
Chapter II
Graham searches for answers to the questions behind ancient works of art, including 25,000-year-old Amazonian paintings and the megaliths of Rapa Nui.
#4
Chapter I
S2E1
#5
Chapter III
S2E3
#6
Chapter V
S2E5
#7
Legacy of the Sages
S1E5
#8
A Fatal Winter
S1E7
#9
Cataclysm and Rebirth
S1E8
#10
Sirius Rising
S1E3
Lowlights
In Cholula, Mexico's oldest continuously-inhabited city, the journalist inspects the world's largest pyramid for signs of a forgotten past.
#13
Once There Was a Flood
S1E1
#12
America's Lost Civilization
S1E6
#11
Ghosts of a Drowned World
S1E4
#10
Sirius Rising
S1E3
The Quality Arc
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