MakerBot, which is responsible for several firsts in the 3D printing industry, has just announced another major milestone - the sale of 100,000 3D printers. They're the first company to do so, and to celebrate, they've launched a #MakerMilestones competition for a chance to win a MakerBot Replicator. The contest invites makers to share their own favorite 3D printing memories and milestones on social media; three winners will be selected by a panel of judges after June 15. The MakerBot Replicator has also been reduced from $2,899 to $2,499 until June 15. Read more at