World News Behind the Scenes: 10/2/2012 11:43 a.m. ET Coral Collapse In the last 27 years, the Great Barrier Reef, the biggest coral reef in the world, has shrunk by 50 percent, according to a story in The Christian Science Monitor. In addition to cyclones and coral bleaching, one of the primary reasons for the reef's decline is starfish. Scientists blame 42 percent of the coral loss on Crown of Thorns starfish which can consume more than 100 square feet of coral a year. 11:00 a.m. ET New Magical Mystery Footage New video of the Beatles from the last leg of their Magical Mystery Tour was released online today. 10:34 a.m. ET Facelift For the first time in nearly 35 years, the iconic Hollywood sign is receiving some much-needed maintenance. According to the Los Angeles Times, beginning today the letters will be stripped of their white paint and power washed before being repainted. Image Credit: Robyn Beck/AFP/Getty Images