They were found to depend only on the intermolecular forces

It was discovered that they stick by inter-molecular forces alone,by van der Waals forces,and you'll learn this in Chemistry and Physics, if you take it.It's unbelievable!It's a whole new way of thinking about making an adhesive!Well, this isn't the end of the story,there are still mysteries.
Why are the gecko's feet looking like this?They have bizarre toes and we don't know why.If you go into a museum and look at each gecko species,you see they have all different hairs,different lengths, and thicknesses, and patterns.