Spiderman Tech - How could Spiderman climb walls?

Have you wondered how Spiderman can climb walls?

Let's look at how spiders can climb walls.  Spiders have claws on all of their 8 legs, which enable them to grasp onto the walls or other surfaces.  But Spiderman seems to have tiny hairs that help him climb to the top of a tall building.  These hairs create electrostatic forces (Van der Waals forces)

Van Der Waals forces, causes the hairs on the spider's feet to interact with surface on the molecular level. These hairs are very similar to spikes on the boots that ice climbers use to climb glaciers.  Except that the hairs on the spider's feet interact with the actual atoms on the wall's surface which help to generate forces that hold them onto the wall.  

For a more in depth explanation of Van Der Waals forces, check out the Khan Academy.

Start the video below at 6:40   

Scientists are also working on molecular type of Velcro which could allow humans to walk on walls like spiders do.  With enough tiny hairs in a piece of fabric, this material could be used to help astronauts move around in space or move large pieces of equipment.  

0:00 through 1:10 in the following video