They used a beam of photons to measure the small magnetic field produced by a gas made up of a million ultra-cold rubidium atoms.

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That means the beam produced is of higher quality than other lasers, is extremely straight (even by the exacting standards of a normal laser beam) and can thus be focused onto a small area.

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Ninety minutes south of the Jim Beam Distillery, Corsair Artisan Distillery is making unique spirits on a very small scale.

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The problem with stereolithography for small things is that the liquid tends to solidify even when it is not at the most intense part of the beam.

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