navi0 Karma 186 Created 5 years ago Recent Submissions 1. ▲ In the US, a rotating detonation rocket engine takes flight (arstechnica.com) 5 points · 7 months ago · 1 comment 2. ▲ Cuttlefish Hunting Behavior (danbeekim.org) 2 points · 8 months ago · 0 comments All submissions on HN · View profile on HN