Dark matter, the elusive substance thought to account for 84 per cent of the mass in the Universe, is one of the largest mysteries in astrophysics. Its presence has been known for almost 100 years, inferred through the gravitational effects it exerts on the mass we can see, but what it actually looks like and how it behaves remains unknown.
For decades, the search for the dark matter particle – the most basic building block making up the elusive substance – has consistently drawn blanks.
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Abigail Beall 