Worms fed bacteria producing double-strand RNA exhibit gene silencing that spreads to the body and the next generation.

“Later they've shown something which will immediately remind you what I told you about with planaria, that you can just take worms and feed them on bacteria that produce this double-strand RNA, and that the double-strand and the silencing would move from the site of ingestion, from the gut where the bacteria are eaten, to the rest of the body and also to the next generation.”