Study claims to provide first direct evidence of dark matter
Astrophysicist Prof Tomonori Totani says research could be crucial breakthrough in search for elusive substance
Nearly a century ago, scientists proposed that a mysterious invisible substance they named dark matter clumped around galaxies and formed a cosmic web across the universe.
What dark matter is made from, and whether it is even real, are still open questions, but according to a study, the first direct evidence of the substance may finally have been glimpsed.