The Mystery of Dark Matter

Imagine this. Eighty-five percent of the universe is completely invisible. You can not

see it. You can not touch it. And yet, without it,

galaxies would not exist. What if the universe you see is just the

surface of something far deeper? This is the mystery of Dark Matter.

When astronomers mapped the cosmos, they expected empty space to be mostly empty.

But it was not Something unseen was pulling on galaxies, shaping their motion,

and holding the universe together like an invisible skeleton. Not stars. Not gas.

Not anything we could detect. Whatever this substance is, it outweighs everything