Rat Park - https://news.ycombinator.com/item?id=19928803 - May 2019 (2 comments)
Addiction: The View from the Rat Park (2010) - https://news.ycombinator.com/item?id=10605524 - Nov 2015 (1 comment)
Rat Park - https://news.ycombinator.com/item?id=9039039 - Feb 2015 (70 comments)
Rat Park drug experiment cartoon - https://news.ycombinator.com/item?id=7742950 - May 2014 (22 comments)
Rat Park experiment upturns conventional wisdom about addiction - https://news.ycombinator.com/item?id=6565426 - Oct 2013 (10 comments)
Rat Park Experiment: A New Theory of Addiction - https://news.ycombinator.com/item?id=6391701 - Sept 2013 (42 comments)