That's not what I'm thinking of really - I should have been clearer - I was thinking more of something like the Mars Curiosity rover - autonomous drones, not ne

That's not what I'm thinking of really - I should have been clearer - I was thinking more of something like the Mars Curiosity rover - autonomous drones, not necessarily aerial, probably solar powered, able to roam around on their own for months/years at a time looking for interesting stuff.