We took full advantage of our friend Katie Novotny (@katienovotnyyyyy) stuck at home recovering from surgery to get her back on the show! Her special Son of Your Dreams is free to stream on YouTube right now!

We talk about a supersonic trebuchet! A new fecal transplant story, this time for food allergies! And also if your microbiome’s linked to psychopathy! Plus massively long-lived sturgeon! How other sturgeon get it on! Musician Slash getting his own snake species! How the number of species is calculated, with a bit of help from our buddy Matt Parker! And fake mermaid science!

In the Patreon bonus, there’s some scientific proof of cats being dicks.

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Direct link to mp3 (right-click to download)