If the tide of South-East Asian migrants had broken upon Bradford in a single wave, as did the Kenyan and Ugandan Asians who fled to London and the Midlands in the late 1960s and early 1970s, their story would be simpler, and happier.
These waves travel at the speed of sound, but when a jet travels at Mach 1 and above these waves merge into one single shock wave as they cannot get out of the way of each other quickly enough.
We have always had huge day-to-day and year-to-year variations in our weather, and we always will do, and a couple of cold winters are no more evidence that climate change has stopped than a single summer heat-wave proves that global warming is happening.
While the original family-run roasters still prosper, and most of Australia remains content with a simple latte or short black (perfectly made, of course), the cities are now in the grip of coffee's third wave: single origin beans, premium small batch roasts, terroir and alternative brewing methods such as the Clover syphon, filter and cold drip.
Britain is highly unlikely to join the single currency in the first wave in January 1999.
On the face of it, though, relying on a single source limits the sorts of wave that can be produced, and therefore the types of task they can perform.
The new single currency has also set off a wave of cross-border mergers and acquisitions.
Inevitably, the move will be interpreted as a snub to the British government because of its reluctance to join the first wave of Europe's single currency.
Thanks to an engineer's trick called "wave division multiplexing, " a single fiber-optic thread can carry upwards of 10 trillion bits per second.
They believe the single currency is likely to lead first-wave members, possibly quite soon, to co-ordinate their economic, fiscal and even social policies ever more closely.
Its disclosure that investigators working for the News of the World had intercepted and erased voicemails intended for murdered 13-year-old Milly Dowler was perhaps the single most incendiary detail in the entire scandal and helped trigger the wave of inquiries and resignations that followed.
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But if the single currency goes ahead, it would now be astonishing if Britain joined in the first wave.
As a simplified model, Dr Page imagines a wave function for a whole universe (for these purposes, a universe can be considered as a single particle), from which two possible versions might be born.
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