julvo Karma 533 Created 8 years ago Recent Submissions 1. ▲ DIY surround sound using lasers [video] (youtube.com) 2 points · 1 year ago · 0 comments 2. ▲ Ask HN: Unsolved hard problems like protein folding? 9 points · 5 years ago · 9 comments 3. ▲ Building an artificial sun that looks realistic [video] (youtube.com) 515 points · 5 years ago · 123 comments All submissions on HN · View profile on HN