Despite the obvious caveats, physicists are right to use fluids and other physical analogues to search for fresh insights about extreme cosmic phenomena, from black holes to the big bang
ANALOGIES have always been helpful in our attempts to make sense of an enigmatic universe. Perhaps the best-known example is, which is often likened to a malleable sheet underlying everything.
Massive things like planets depress the sheet, such that less massive things – people, asteroids and so on – tend to fall inwards. It isn’t a perfect analogy, of course, but it allows those of us who can’t read the equations of general relativity to graspIn recent years, researchers have been using fluids and collections of cold atoms as space-time equivalents. These aren’t just verbal …
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