Few developments changed the world like flight. The ability to move around the world quickly and see it from above absolutely revolutionized humanity.
There's still nothing quite like seeing the world from ground level, of course. It's just a much more time-intensive, sweat-producing process, and at some point, you just can't rely on your own two feet anymore.
Just how far a human can go on the planet just by walking is an interesting question and one that Joseph Pisenti of RealLifeLore decided to find out.