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

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