feb Karma 249 Created 15 years ago Recent Submissions 1. ▲ I Lost More Than Half My Business (youtube.com) 4 points · 3 years ago · 0 comments 2. ▲ A new way to store thermal energy (2017) (news.mit.edu) 2 points · 4 years ago · 1 comment All submissions on HN · View profile on HN