“Lost” Dark Matter Discovered in Space, Scientists Say

Astronomers say they have found a type of matter that cannot be seen, but which is thought to dominate the cosmos, in a place where it was thought not to exist.

The finding gives weight to a common theory of how the universe is pieced together.

The exact nature of the matter, called dark matter, is unknown, but scientists believe it accounts for more than 90 percent of the mass in the universe.