Digital Journal, March 2014 (Photo: NASA)
Scientists studying bottlenose dolphins that use sponges as tools to protect their sensitive beaks has shown that social behavior can shape the genetic makeup of an animal population in the wild.
https://www.digitaljournal.com/news/environment/dolphin-watch-how-social-behavior-affects-genetic-makeup/article/378095
Internet Archive: https://web.archive.org/web/20210417204755/http://www.digitaljournal.com/news/environment/dolphin-watch-how-social-behavior-affects-genetic-makeup/article/378095