Where do eels come from, and where do they go? Chris attempts to explain why commonly found eels are actually scientific mysteries.
Claire talks to Nathan Lo about the weird contents of a termite's gut, and how it helps them get more than wood out of... wood.
And Stu explores the weird world of egg laying furry milk feeders, the monotremes - the last mammals of their kind.
Chris Lassig, Stuart Burns, Claire Farrugia and Manisha Bhardwaj.