Video: Robot's Supersonic Air Jets Allow It To Climb Just About Any Surface -- Popular Science
Many wall-walking robots mimic natural adhesives--like the sticky feet of geckos--to remain fixed to a surface while they scale it.
But this little bot uses nothing but a supersonic version of a well-known principle of fluid dynamics to cling to just about any surface--without the surface of its grippers ever actually touching it.
Read more ....