Diseases can spread quickly. Someone with a cold infects a few casual contacts, who in turn infect others. Ideas can also spread that way, along so-called random networks. But Damon Centola at MIT says that ideas and beliefs spread faster and more efficiently when they’re reinforced in clustered networks, with overlapping connections among the members.
Centola recruited more than 1,500 participants for what was billed as a Web-based health community. Each had an anonymous profile and was matched with health buddies. In one group, a minimal number of links connected the participants. The other group was denser, with redundant links.
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Editor's Note: The following is an excerpt from Matthew Kahn's book Climatopolis .
Los Angeles is a hedonist’s paradise. At night, you can cruise the Sunset Strip. Although The Doors no longer play there, you may run into Paris Hilton or Britney Spears before seeing Brad Pitt and Angelina Jolie at a red-carpet event. During the winter, you might venture downtown to watch Kobe Bryant and the Lakers play. Every day of the year you can sit outside at Starbucks and try to identify professional basketball players looking for a latte in West Los Angeles. In spring 2009 I spotted Baron Davis of the Los Angeles Clippers at a Westwood Starbucks (but he didn’t seem to recognize me). In fall 2009 I spotted Brian Wilson of the Beach Boys as he strolled in Little Holmby Park (he didn’t give me a knowing nod or wink either). I saw Vin Diesel jog past my house not long ago (again, no seeming recognition on his part). Even the dignified former secretary of state, Warren Christopher, didn’t recognize me as he got out of his car while parking on my block. These cases suggest that I’m not a VIP, but a player such as you will have the option of ending the night at a party at the Playboy Mansion near UCLA.
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Helicopter-mounted lasers that can dazzle and defend against heat-seeking missiles are now under development, researchers reveal. [More]
Laser - Missile - Infrared homing - Helicopter - Business
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