On a cosmic scale, a universe that was once thought to be a few thousand years old, and to consist of a handful of orbs circling Earth against a fixed backdrop of stars, has been shown to have an age of 13.77bn years—a value believed to be known to within a precision of three parts in a thousand. That universe may also be infinite in size.
Physicists have got used to the idea that mathematical theories can be turned into reliable representations of reality, thus producing understanding. And one discovery based on maths that physicists were pretty confident of making was of a phenomenon called Supersymmetry, which gives coherence to the current, rather ad hoc explanation of the menagerie of fundamental particles that has been collected since the 1890s.
Suddenly, the subject looks wide open again. The Supersymmetricians have their tails between their legs as new theories of everything to fill the vacuum left byare coming in left, right and centre. All of these are mind-bending. One modestly seeks to overturn the principle of causality. Another suggests that everything in the universe really is connected to everything else, and that it is from this simultaneous connection of all with all that the fabric of reality emerges.
We are but grains in the sands of time
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