One treatise leads the reader through an exegesis of the constitution's text, then through the history of the founding period, then through the understandings of impeachment common in England at the time, then through interpretations that were prevalent in America, and then, finally, to the conclusion that there are no grounds to impeach the president.

ECONOMIST: The impeachment hearings

Stonehenge mystifies archaeologists even now, who remain unable to pinpoint its founding more accurately than the thousand year period between 3000 and 2000 BC.

UNESCO: UK National Commission for UNESCO - Longest crowds for the longest day, as Stonehenge solstice visitors reach 23,000

The film, covering the period from the revolution of 1911 to the Communist Party's founding in 1921, prompted numerous comments on Chinese internet forums about the lessons it offered for rebelling against bad government.

ECONOMIST: Commemorating China��s 1911 revolution

Likelier explanations of the decrease in suicide attacks are, simply, that the weather is now too hot, or that Islamist insurgents may be storing up an especially violent campaign for the referendum period, just as they did for the weeks in April after the founding of the government.

ECONOMIST: Iraq's constitution