According to string-theory advocates, our universe has at least 10 dimensions. But we humans can only directly perceive three spatial dimensions. We experience the passage of time, a fourth dimension. Beyond that, we only know other dimensions are even possible through theoretical mathematics. Our universe may hold secrets that we will never be able to observe directly.
Even if you discount string theory and the idea of dimensions beyond our perception, our world contains a wealth of information that most of us aren't aware of in our daily lives. When visiting a city for the first time, we may only have our senses to rely upon when gathering information. A smartphone or computer can help out, pulling in more data about the city's geography, history, economics, cuisine, culture and other features.
Augmented-reality applications -- software that overlays a level of digital information on top of the physical world around us -- have brought us more data. With an augmented-reality app on your smartphone, you might be able to hold your phone's camera up to capture the image of a city street. Looking at the screen, you can see information about your surroundings. The augmented reality app maps digital information to your real-world surroundings.
While these apps can be informative and entertaining, the form factor is still a little clunky. We have to hold up the smartphone and look at the screen -- it's like you're on a "Star Trek" away team, and you're the one with the tricorder.
Google's answer to the problem comes in the form of a wearable device. It looks like a pair of sunglasses with one side of the frames thicker than the other. It's called Project Glass, and it might turn your world into endless amounts of information.