Dark matter: Physicists may have found telltale

European astronomers said on Wednesday that an anomalous energy signal detected by an orbiting satellite could be a telltale of the enigmatic substance known as dark matter.

The researchers, in a study appearing in the British journal Nature, say the hunch is that they picked up a signature of this strange phenomenon, but more work is needed.

Some years ago, astrophysicists calculating the amount of matter in the Universe arrived at the startling discovery that ordinary material -- atoms -- comprises perhaps as little as five percent of the stuff in the cosmos.

The rest, they believe, comes from the "dark" sector: matter and energy that appear to be pervasive but whose nature remains a puzzle.

Dark matter, which believes to account for 23 percent of the Universe, has been detected only indirectly, through the gravitational pull it exerts on visible matter.

What it is has ignited huge debate, including the hypothesis that dark matter is a new dimension of the Universe.

Another theory is that dark matter must be a new particle, or particles, that interact so weakly with ordinary matter that it does not produce light-emitting reactions. WIMPS (Weakly Interacting Massive Particles) are among the candidates for this.

via Dark matter: Physicists may have found telltale.