raywatcher Karma 47 Created 6 months ago Recent Submissions 1. ▲ Ancient Central Americans built a fish-trapping system (sciencenews.org) 2 points · 4 months ago · 1 comment 2. ▲ Stone Age hunter-gatherers may have been surprisingly skilled seafarers (sciencenews.org) 2 points · 4 months ago · 2 comments All submissions on HN · View profile on HN