In the youtube below, from Big Think, Dr Michio Kaku explains what Dark Matter is
Theoretical physicists have put forward a new hypothesis that aims to connect the world of visible physics to the hidden forces of our Universe: what if there’s a portal that bridges the gap between the standard model to dark matter and dark energy?
The idea is that the reason we struggle to understand things such as dark matter and dark energy isn’t because they don’t exist – it’s because we’ve been oblivious to a portal through which regular particles and these ‘dark particles’ interact. And it’s something that could be tested experimentally.
Inventing a new kind of matter
March 24, 2017 by Lawrence Goodman
Imagine a liquid that could move on its own. No need for human effort or the pull of gravity. You could put it in a container flat on a table, not touch it in any way, and it would still flow.
Brandeis researchers report in a new article in Science that they have taken the first step in creating a self-propelling liquid. The finding holds out the promise of developing an entirely new class of fluids that can flow without human or mechanical effort.
Read more at: https://phys.org/news/2017-03-kind.html#jCp