If we carry on using the world's resources at the current rate, by the mid-2030s we will need the equivalent of two planets to maintain our lifestyles, according to a major report today by the World Wildlife Fund. Its director of campaigns, David Norman, says it's the ecological version of the credit crunch.
Barack Obama tonight takes over prime time US television for a 30-minute broadcast. Suzanne Goldenberg is in Philadelphia, where both candidates were campaigning yesterday.
Foreign affairs columnist Simon Tisdall assesses the implications of the incursion by US troops into Syrian territory at the weekend.
Technology correspondent Bobbie Johnson looks at the deal between Google and US publishers that will make millions of books available online.
Mathematician Marcus du Sautoy gives his reaction to taking over from Richard Dawkins in a presitgious post at Oxford University.
And Guardian music journalist Dave Simpson describes his quest to find all 43 ex-members of the Fall. He's written about his experience in a new book, The Fallen.
