Science and technology

Associated Press
FILE - In a Monday, Nov. 7, 2011 file photo, Facebook creator Mark Zuckerberg takes questions from members of the media as a crowd looks on on the campus of Harvard University, in Cambridge, Mass. On Tuesday, May 1, 2012, Facebook launched an upgrade to its Timeline structure, which asks users to check their organ donor status and directs them to Donate Life America's National Registration Page, allowing them to designate a donation decision if they have not done so already.  In an exclusive interview with ABC News' Robin Roberts on "Good Morning America" this morning, Zuckerberg announced the new initiative and became one of the first Facebook users to sign up to donate on the social network.  (AP Photo/Steven Senne, File)

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