A Canadian firm has courted controversy with its claim to have built a practical quantum computer, a feat thought to be decades away. Now, independent researchers are trying to understand whether it really can tap the strange world of quantum physics.
For the modest sum of $15m (£9m), a start-up near Vancouver will sell you a black box the size of a garden storage shed with its logo emblazoned on the side in white neon.
Not sold yet?
What if I told you the contents of the box were around 150 times colder than interstellar space?
You still need some convincing - I get it.
How about this: The box contains a machine that can solve some of the thorniest mathematical problems and could revolutionise computing.
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