Dr Karl Podcast Frisson, cryogenic freezing and thylacines
Nov 6, 2025
Zoe Keane, an evolution expert and science communicator from Tasmania, dives into fascinating topics. She explains why Neil the Seal has wandered into Hobart and how thylacines resemble dogs due to convergent evolution. Discover how sniffing a fart works (or doesn’t) and the science behind music giving us goosebumps, known as frisson. Zoe also discusses the potential of sniffer dogs in detecting disease, the possibilities of cryogenic freezing, and even why moist hay bales can catch fire. It's a captivating blend of ecology, evolution, and quirky science!
AI Snips
Chapters
Books
Transcript
Episode notes
Teen Elephant Seal's Local Loyalty
- Zoe Keane explains Neil the Seal is a juvenile elephant seal born in Tasmania that returns repeatedly to its birthplace.
- His behaviour (attacking mailboxes, traffic cones) likely reflects site fidelity and juvenile training for adult battles.
Convergent Evolution Explains Thylacine Shape
- Zoe Keane explains thylacine dog-like form evolved via convergent evolution to fill a predator niche.
- Similar selective pressures produce similar body plans despite distant ancestry.
Aurora Colours Depend On Gas And Height
- Oxygen and nitrogen produce different aurora colours depending on altitude and excitation states.
- Oxygen commonly gives green and sometimes red at higher altitudes via a forbidden transition, while nitrogen can also contribute.
