Imagine a country where children do nothing but play until they start compulsory schooling at age seven. Then, without exception, they attend comprehensives until the age of 16. Charging school fees is illegal, and so is sorting pupils into ability groups by streaming or setting.

The results of my experiment are in agreement with those of Michelson and with the law of General Relativity.

When Lance was introduced, he held out his hand toward the feeb and said, “Hi, I'm current occupant:” The FBI agent was so nervous about the chopper flight he never noticed.

This system of so-called allostasis, of maintaining control through constant change, stands in contrast to the mechanisms of homeostasis that keep the pH level and oxygen concentration in the blood within a narrow and invariant range.