Across the Middle East lie thousands of enigmatic stone megastructures whose shape, when seen from the air, looks like giant kites. The oldest were built around 7,000 B.C., predating the earliest Egyptian pyramids and Stonehenge by several thousand years. Since their discovery in the 1920s, these "desert kites" have posed a stubborn mystery: Who designed them, and why were they built? How did prehistoric people, before the invention of writing, draw detailed scale models without compasses, hot air balloons, or drones? Using cutting-edge technologies, an international team of archaeologists is determined to find answers and shed new light on the poorly understood Stone Age period of human history. 

The size of a football field, the International Space Station hurtles around Earth at 17,000 mph, shielding its astronauts from the most hostile environment humans have ever endured. To mark the 25th anniversary of the continuous human presence in space, astronauts and Mission Control insiders reveal the most terrifying moments aboard this remarkable orbiting laboratory, where a single mistake could prove fatal. From ammonia leaks, meteor strikes, and docking disasters, to spacewalk horrors, potentially lethal showers of space junk, and the moment the entire ISS backflipped out of control, NOVA uncovers tales of life and death at 1.3 million feet above our planet – and the human ingenuity and teamwork that each time saved the day.