Ghost Minitaur robot is only halted by ice

It dazzled technology fans when it launched last September. But, despite appearing to be unstoppable with its ability to climb fences and open doors, it seems The Ghost Minitaur does have a weakness. Recently-released footage of the device reveals that ice causes it to freeze in its tracks - albeit only temporarily. A video uploaded by Philadelphia-based Ghost Robotics shows it effortlessly striding over various terrains, before reaching a stumbling block on the frozen water. There, it skids and slides - momentarily losing its stability - before showing an impressive ability to re-balance and continue.