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They placed a replica flag inside a . On Earth, air resistance makes a flag stop moving quickly. But in a vacuum, without air to provide friction, the flag continued to oscillate for a long time after being touched. The "waving" wasn't wind; it was physics in a vacuum. Act III: The Lunar Footprint

As the episode wrapped, the team looked at the data. They had recreated the "faked" photos, proved the flag’s movement, and literally touched a piece of human history with a laser beam.

Conspiracy theorists argued that footprints in the dry lunar dust should be impossible without moisture. Adam stepped into a tray of dry, fine-grained lunar simulant in a vacuum. Because the dust was jagged and had nothing to "cushion" it, the footprint held its shape perfectly. No water required. Act IV: The Laser Reflector