You know the story: One night over whiskey, Leland Stanford and Eadweard Muybridge were having an argument about the Atlas robot from Boston Dynamics. The question: does Atlas always have one foot on the ground while he’s moving?
The primitive photographic technology of the time had no way of telling if the robotic wonder was ever truly airborne. But Muybridge kept at it, and eventually came up with this.

Case closed! Robots can fly.