All we can see around us, from planet Earth to distant galaxies, represents just five per cent of the universe – the rest is either dark energy or dark matter
.
So what do we know and what do we not know about these elusive components of the cosmos?

The simple answer is that we don’t know much about dark matter and even less about dark energy. However, that could change quite soon thanks to groundbreaking research being done by scientists at the European Space Agency and CERN, home to the world’s foremost particle accelerator, the Large Hadron Collider.

The LHC’s discovery three years ago of the http://home.web.cern.ch/topics/higgs-boson” rel=“external”>Higgs Boson==
set researchers on a voyage of discovery to the dark side of the universe.

They are about to fire up the colossal accelerator again this year, and for the first time at full power. That extra energy is what’s giving optimism for new revelations about dark energy and dark matter. One scientists tells Space
“we mig