article_snippet: Astronomers may have finally found evidence of the elusive dark matter that permeates the universe.
article_snippet: How these mysterious waves are made, and where exactly these mysterious waves come from have baffled scientists for years, but scientists believe these mysterious waves are a sign for dark matter.
article_snippet: Dark matter is the missing substance that makes up to 80 per cent of the universe's mass.
article_snippet: Called 'dark matter', this substance appears to make up at least 80 per cent of the matter in the known universe.
article_snippet: The researchers caution that while these preliminary results are exciting, there's more work to be done to confirm a dark matter origin.
article_snippet: Scientists know that dark matter exists because dark matter exerts gravitational effects on visible matter, which explains the observed rotation of galaxies and galaxy clusters as well as the fluctuations in the cosmic microwave background.
article_snippet: The gravitational detection of dark matter tells you very little about the particle behaviour of the dark matter,' said Matthew Walker, assistant professor of physics and a member of CMU's McWilliams Center for Cosmology.
article_snippet: A leading theory suggests that dark matter particles are WIMPs, or Weakly Interacting Massive Particles.
article_snippet: But now we may have a non-gravitational detection that shows dark matter behaving like a particle, which is a holy grail of sorts.'
article_snippet: A leading theory suggests that dark matter particles are WIMPs, or Weakly Interacting Massive Particles.
article_snippet: The trouble is, the high-energy rays also originate from many other sources, including black holes and pulsars, which makes it difficult to untangle a dark matter signal from the background noise.
article_snippet: The fact that there are gamma rays and also a clump of dark matter in the same direction makes it quite interesting,' Professor Koushiappas said.
highlights_snippet: Dark matter is the missing material making up 80% of universe's mass .
  
highlights_snippet: Scientists  say this is the most convincing signal of dark matter yet .