Is our Universe left-handed? (Synopsis)

“Since the beginning of physics, symmetry considerations have provided us with an extremely powerful and useful tool in our effort to understand nature. Gradually they have become the backbone of our theoretical formulation of physical laws.” –Tsung-Dao Lee

We normally think of the Universe as being symmetric, in the sense that no one direction, location or configuration is inherently preferred over another. But at some level, the laws of physics aren’t completely symmetric, as we see from the decays of certain elementary particles.

Image credit: author durbarsquare of http://readingpenrose.com/2014/05/07/on-cpt-symmetry-and-time-reversal-i/.
Image credit: author durbarsquare of http://readingpenrose.com/2014/05/07/on-cpt-symmetry-and-time-reversal-i/.

Could it be possible, then, that even the spiral galaxies in the Universe have a preferred direction? That perhaps the Universe was born with an intrinsic preference for the direction of rotation, and that would be imprinted in the galaxies today?

Image credit: SDSS.
Image credit: SDSS.

There’s some evidence for it, but is it enough to convince you? Get the facts and decide for yourself!