How do you know how old a rock is?
Adam Stock
Researchers at Glasgow University have found a startling range of caffeine levels in high street coffees.
R.E.M. had a hit single in 1993, in which they asked ‘What’s the Frequency Kenneth?’ Now in 2011 Adam Stock finds engineers designing wind turbines are asking a similar question.
Adam Stock assesses whether cycling to work is as healthy as it seems.
![Credit: Stephen McKay [CC-BY-SA-2.0 (www.creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons](http://the-gist.org/wp-content/uploads/2011/03/Patford_Bridge_Substation_-_geograph-org-uk_-_183276-150x110.jpg)
Energy supply is a complex business. Fluctuating supply and demand mean it can be difficult for energy companies to produce enough energy during high demand periods without producing wasted energy in low demand periods.
Adam Stock writes about the influence of control engineering on wind turbines and how the size limit for these machines may be reached for an unexpected reason.