The wikipedia article on them says that divers can create them too, with the aid... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

nwh on Feb 21, 2013 | parent | context | favorite | on: Dolphins Call Each Other By Name

The wikipedia article on them says that divers can create them too, with the aid of scuba gear.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact