It's Gone Pear Shaped for Time Travel

[Davin]

http://www.bbc.com/news/uk-scotland-36597142

Most of the fundamental theories of physics are based on symmetry. That symmetry dictates, among other things, that the nuclei of atoms can be one of just three shapes: spherical, discus or rugby ball.

But Dr Marcus Scheck at UWS and Professor Peter A Butler of the University of Liverpool have discovered a fourth form of nucleus.

It's pear-shaped.

[...]

In other words, a pear-shaped nucleus points to why our Universe contains so much more matter than antimatter.

But that's not all it points to.

Dr Scheck says: "We've found these nuclei literally point towards a direction in space. This relates to a direction in time, proving there's a well-defined direction in time and we will always travel from past to present."

So time travel would appear to be a non-starter.

Cool discovery. I haven't read the white docs. If it pans out, then it would be the answer to a lot of open questions.

[Tank]

Excellent post. Fascinating as symmetry is fundamental to the current models.