Do we live on the skin of a bubble in an extra dimension?

Researchers at Uppsala University in Sweden have developed an interesting model of the universe. They describe and support their idea in a paper that uses the principles of string theory (according to which all matter is made up of tiny, vibrating strings) and simultaneously incorporates the phenomenon of dark energy (which is considered as a possible cause for the expansion of the cosmos).

According to their model, our universe is being carried along on the skin of a kind of bubble that is e...