What can you make just by folding a single piece of paper?

In Web Design I watched a video of Robert Lang explaining how simple it is to make even the most complicated creations. You can watch the video here

Why has origami changed?

Origami has changed because people created basic laws in making origami. You might not believe it, but origami is all about math.people can study the laws of origami and make a better system in making it. As people evolve, so does origami. Everything is evolving: techonology, communication, and people. People are getting more into origami so people are able to get better at it.