GravitasFailure Karma 621 Created 4 years ago Recent Submissions 1. ▲ A 3D printer that can print itself [video] (youtube.com) 2 points · 2 years ago · 0 comments 2. ▲ Gadgets and Gizmos That Inspired Adam Smith (reason.com) 1 point · 2 years ago · 0 comments All submissions on HN · View profile on HN