chii Karma 19,354 Created 15 years ago Recent Submissions 1. ▲ Can a Pendulum be a Battery? [video] (youtube.com) 2 points · 1 day ago · 0 comments 2. ▲ The Space Propulsion Tier List [video] (youtube.com) 1 point · 5 days ago · 0 comments 3. ▲ Jerome Powell's being threatened [video] (youtube.com) 13 points · 19 days ago · 0 comments All submissions on HN · View profile on HN