Quantum Space av Jim (Freelance science writer) Baggott

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Today we are blessed with two extraordinarily successful theories of physics. The first is Albert Einstein''s general theory of relativity, which describes the large-scale behaviour of matter in a curved spacetime. This theory is the basis for the standard model of big bang cosmology. The discovery of gravitational waves at the LIGO observatory in the US (and then Virgo, in Italy) is only the most recent of this theory''s many triumphs.The second is quantum mechanics. This theory describes the properties and behaviour of matter and radiation at their smallest scales. It is the basis for the standard model of particle physics, which builds up all the visible constituents of the universe out of collections of quarks, electrons and force-carrying particles such as photons. The discovery of the Higgs boson at CERN in Geneva is only the most recent of this theory''s many triumphs.But, while they are both highly successful, these two structures leave a lot of important questions unanswered.