https://news.v.daum.net/v/20190515103305725?fbclid=IwAR28YaLcAjWGC9lGTtP4LAoxlRUdNyV5nJ3hl50Tp2QtTVIS4-TdKOivY8Q

https://www.scientificamerican.com/article/bomb-carbon-has-been-found-in-deep-ocean-creatures/?redirect=1

Radioactive carbon from Cold War nuclear tests has been found deep in the ocean - CNN
https://www.cnn.com/2019/05/13/asia/bomb-carbon-deep-ocean-scn/index.html

'Bomb carbon' from Cold War nuclear tests found in deep ocean trenches | Fox News
https://www.foxnews.com/science/bomb-carbon-from-cold-war-nuclear-tests-found-in-deep-ocean-trenches