BEAM Robotics is fundamentally about drawing inspiration from nature. I am thinking about what it would take to create a spider-like robot, using muscle wire to actuate music wire legs in a way that is similar to how a spider walks.
Then, of course, I got to fantasizing about a spider robot that could climb furniture, curtains, ... heck, walls too. Wouldn't that be cool? So then I thought to myself, "self, how do you suppose spiders can hang onto walls and whatever?" and so I brought up trusty Google and found out.
Spiders have a bunch of hairs on each foot, that branch out into finer hairs. Ultimately about 600,000 hairs per spider. These super-small hairs use the Van der Waals force of close proximity, electromagnetic attraction between atoms -- like some kind of atomic nano-Velcro.
So, all I have to do is create several hundred thousand ultra microscopic hairs and glue them one by one onto some kind of foot...