What Is Dark Matter?

Michio Kaku: Well there is a theory, David, about what dark matter is.  You talk about different universes and let’s say that our universe is a sheet of paper.  We live our entire life on this sheet of paper, but directly above us there could be a parallel universe, hovering right over us, perhaps inches, centimeters away and objects in this parallel universe would be invisible.  Light travels beneath the universe, so we never see this other galaxy. But gravity, gravity goes between universes because gravity is nothing but the bending of space, so if the space between two sheets of paper is bent slightly gravity then moves across.

So think about it.  This other galaxy in another universe would be invisible, yet it would have mass.  That’s exactly what dark matter is.  Dark matter is massive—it has gravity—but it’s invisible.  It has no interactions with light or the electromagnetic force, so there is a theory that says that perhaps dark matter is nothing but matter, ordinary matter in another dimension hovering right above us.  We should also point out, however, that there are other theories too.  Dark matter is the cutting edge of science.  Some people think that maybe it is a higher vibration of the string.  All the atoms of our body represent the lowest octave of a tiny rubber band vibrating all over our body, and the rubber band could have a higher octave.  That next octave could be dark matter. So that’s yet another explanation for what dark matter might be.

So the bottom line is this.  There is a shelf full of Nobel Prizes waiting for you, waiting for anyone who can come up with a convincing and experimentally verified explanation of the origin of dark matter.

The answer to this question is at the cutting edge of science, but one theory states that dark matter is nothing but ordinary matter in another dimension hovering right above us.

LinkedIn meets Tinder in this mindful networking app

Swipe right to make the connections that could change your career.

Getty Images
Sponsored
Swipe right. Match. Meet over coffee or set up a call.

No, we aren't talking about Tinder. Introducing Shapr, a free app that helps people with synergistic professional goals and skill sets easily meet and collaborate.

Keep reading Show less

26 ultra-rich people own as much as the world's 3.8 billion poorest

The Oxfam report prompted Anand Giridharadas to tweet: "Don't be Pinkered into everything's-getting-better complacency."

Getty Images and Wikimedia Commons
Politics & Current Affairs
  • A new report by Oxfam argues that wealth inequality is causing poverty and misery around the world.
  • In the last year, the world's billionaires saw their wealth increase by 12%, while the poorest 3.8 billion people on the planet lost 11% of their wealth.
  • The report prompted Anand Giridharadas to tweet: "Don't be Pinkered into everything's-getting-better complacency." We explain what Steven Pinker's got to do with it.
Keep reading Show less

Your body’s full of stuff you no longer need. Here's a list.

Evolution doesn't clean up after itself very well.

Image source: Ernst Haeckel
Surprising Science
  • An evolutionary biologist got people swapping ideas about our lingering vestigia.
  • Basically, this is the stuff that served some evolutionary purpose at some point, but now is kind of, well, extra.
  • Here are the six traits that inaugurated the fun.
Keep reading Show less
Videos
  • Facebook and Google began as companies with supposedly noble purposes.
  • Creating a more connected world and indexing the world's information: what could be better than that?
  • But pressure to return value to shareholders came at the expense of their own users.
Keep reading Show less