Source: http://www.eawag.ch/en/news-agenda/news-portal/news-detail/news/bakterien-koennen-kollektives-gedaechtnis-entwickeln/?tx_news_pi1%5Bcontroller%5D=News&tx_news_pi1%5Baction%5D=detail&cHash=dd71dc5155ee3641ed2611af54687a5a