Budding Trivial Pursuit champions, remember this name. The unpronounceable Icelandic volcano elicited unprintable words as its plumes of ash shut down air travel across Europe.
For connecting more than half a billion people and mapping the social relations among them, for creating a new system of exchanging information and for changing how we live our lives, Mark Elliot Zuckerberg is TIME's 2010 Person of the Year
12. Eyjafjallajokull