Meteor shower particles that are quickly blown away by solar radiation pressure). Recently, Peter Jenniskens has argued that most of our short-period meteor showers are not from the normal water vapor drag of active comets, but the product of infrequent disintegrations, when large chunks break off a mostly dormant comet. Examples are the Quadrantids and Geminids, which originated from a breakup of asteroid-looking objects, 2003 EH1 and 3200 Phaethon, respectively, about 500 and 1000 years ago. The fragments tend to fall apart quickly into dust, sand, and pebbles, and spread out along the orbit of the comet to form a dense meteoroid
Timeline of the 2011–12 Saudi Arabian protests (May–December 2011) and thirty women among the Riyadh protestors were arrested. Most were released by 28 December. During protests in Qatif on 30 December calling for freedom and equality and for the release of political activists from prison, police snipers on rooftops fired guns at protestors. At least three protestors were injured. Similar protests were held in other towns and villages in the Qatif province. Timeline of the 2011–12 Saudi Arabian protests (May–December 2011) The following is a timeline of the 2011–2012 Saudi Arabian protests from May to December 2011. The 2011–2012 Saudi Arabian protests are a series of ongoing protests taking