* "The world is facing an increasing risk of 'irreversible' climate shifts because worst-case scenarios warned of two years ago are being realized."
* Despite other gains, India struggles with child malnutrition.
* Analysis of the first four years of Pope Benedict's rule.
* 43 years later, France rejoins NATO.
* Hot: "The Goce satellite will map minute variations in the pull of gravity experienced across the planet."
* Whoah. The Pentagon invests in a new intelligence blimp.
* Facebook ponders how to, you know, turn a profit.
* So, what next for the evolution of roller coasters?