Feature Space

Light in the Dark

Scientists may be on the brink of identifying a mysterious form of matter

By Tom Siegfried

- More than 2 years ago

For decades, astronomers have grappled with their inability to decipher the universe’s darkest secret: the identity of most of its matter.

WIMP WIND As the solar system moves along a spiral arm of the Milky Way toward the constellation Cygnus, it may pass through a halo of dark matter particles.