Dark matter
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Science shines light on dark matter

Scientists from the University of Leicester say they may have solved one of the most enduring mysteries in modern physics - the nature of dark matter.

This is something that accounts for the difference between the observable mass of material in space, and the way it moves - which would suggest far greater mass.

Researchers say they have identified a signal which - if confirmed - would lay the blame on 'axions', emitted from stars.

These are one of the candidate particles physicists believe may account for 85% of the missing mass in the universe.

Astronomer Dr Andy Read who co-authored the research spoke to Today.

First broadcast on the Today programme on 17 October 2014