New gravity theory, no dark matter, like MOND.

http://phys.org/news/2016-11-theory-gravity-dark.html

It matches the observations but is built from first principles, not tweeking a gravity theory that produces the results.

Originally posted by sonhouse
http://phys.org/news/2016-11-theory-gravity-dark.html

It matches the observations but is built from first principles, not tweeking a gravity theory that produces the results.

https://en.wikipedia.org/wiki/Entropic_gravity

paper published by Verlinde
https://arxiv.org/pdf/1001.0785v1.pdf

http://xkcd.com/1758/