Think of it like a real-life Jason and the Argonauts; an earthly Avengers Assemble; the greatest meeting of minds, skills and superpowers our planet might ever have seen.

Last week, at a resort on the sun-drenched south-west coast of Sicily, Google convened some of the world's most brilliant thinkers for its annual, three-day, top-secret summer symposium of ideas. On the agenda were the most pressing issues facing humanity: "Online privacy, politics, human rights," one source revealed, "and of course, the environment."

The Telegraph London