60 km Jubilee Greenway to be signed in imperial

On 9th June 1977, the Queen officially opened the Silver Jubilee Walkway, a 21 km walking trail around central London to mark her Silver Jubilee, or 25 years on the throne. Thirty-three years later, work is under way to celebrate the Queen’s Diamond Jubilee with a new 60 km walking trail, the Jubilee Greenway, providing walkers with a kilometre to walk for every year of the Queen’s reign.

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Is there room for non-standard units within SI?

One of the main advantages of SI – the metric system – is that it can be used for any measurement task (from the kitchen to the science lab) – thus avoiding the need to learn a plethora of specific units for specific purposes.  However, is there a case for making certain exceptions to this rule? (Warning: this article is for the technically-minded).

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