Facebook said that 1 billion people logged on to its social ne working service on Monday, a new record. Facebook CEO and cofounder Mark Zuckerberg announced the new metric in a post on his Facebook page on Thursday, noting that 1 in 7 people on Earth used the social network to connect with their friends and family on that day. Here's Zuckerberg's full post: We just passed an important milestone. For the first time ever, one billion people used Facebook in a single day. On Monday... More