Puzzling Conspiracy between Dark Matter and Visible Matter

[didact]

On 4th of July, 2013 a European team of astronomers led by Hongsheng Zhao of the SUPA Centre of Gravity at the University of St Andrews presented a radical new theory at the RAS National Astronomy Meeting in St Andrews. Their theory suggested that the Milky Way and Anromeda galaxies collided some 10 billion years ago and that our understanding of gravity is fundamentally wrong. Remarkably, this would neatly explain the observed structure of the two galaxies and their satellites.

http://www.dailygalaxy.com/my_weblog/2014/07/theres-a-puzzling-conspiracy-between-dark-matter-and-visible-matter-clashing-theories-of-the-univers.html#more

[defacto7]

1. I'll read up on this.

We know the 2 galaxies collided 10 billion years ago and will again in a billion or so years, but that follows what we already know about gravity. But it's interesting, though there's a lot more to be said.