During the three month competition, there were 73 teams that submitted solutions to the dark matter problem.

FORBES: Mapping The Universe Through Collective Brainpower

And it is by measuring the ratio of the latter to the former, and the behaviour of any excess across the energy spectrum, which may provide a way into the dark matter problem.

BBC: Alpha Magnetic Spectrometer to release first results

The problem is that dark matter is invisible.

ECONOMIST: Spotting dark matter, at last