Meanwhile, in real caves.
A robot with wheels or any number of legs wouldn't get to 100 metres in the vast majority of real caves, or if it did it would be unable to return - maybe not a problem?
Can't say for caves in the Americas but the ones in Wales are far from level and unlike the ones on TV don't have suspiciously even floors. vertical pitches are very common and water in stream-ways or partially or fully flooded caverns is almost inevitable.
Must say a submersible drone that can fly above and below the water surface would be an impressive feat if anybody does it.
Biting the hand that feeds IT
