Astronomers map largest ever zone of dark matter

http://www.theregister.co.uk/2012/01/10/astronomers_largest_map_dark_matter/

Earth Hour – Twitter Takes Earth Hour Viral

http://m.smh.com.au/environment/earth-hour/darkness-lights-up-twittersphere-as-earth-hour-goes-viral-20110327-1cbwo.html

Millions See The Light & Turn It Off – Earth Hour

http://m.smh.com.au/environment/millions-see-the-light-and-turn-it-off-20110326-1cb6v.html