Oddly, the technical challenge of sending a ground robot through an unknown dynamic environment is even more difficult than a flying robot. There's very few obs

Oddly, the technical challenge of sending a ground robot through an unknown dynamic environment is even more difficult than a flying robot. There's very few obstacles in the sky. Another thing to consider is petty theft and vandalism. Maybe I'm jaded, but I think a ground robot would not last very long. With an aerial vehicle, packages can be dropped with parachutes. (though, I'm pretty sure some will be shot down before they're generally accepted)