So you think you’re eco-conscious hey? You don’t own a car, you keep a kitchen compost and you even reuse those brown paper mushroom bags to discretely drink your canned beer on public transport. Good for you! Unfortunately it adds up to about nothing if you take just one domestic flight. Fly shame is real, and many people are going cold turkey on holiday making to reduce their environmental impact. In this episode, Justin B tries to convince Justin Z not to become one of these people. We also talk about new interesting findings in evolutionary biology, how a jet engine works and the magic castle in Los Angeles. REFERENCES Roberta Bergero, Jim Gardner, Beth Bader, Lengxob Yong, Deborah Charlesworth (2019). ; Exaggerated heterochiasmy in a fish with sex-linked male coloration polymorphisms. PNAS 2019,2018 18486; DOI:10.1073/pnas.1818486116 Bell, R. C., Webster, G. N. and Whiting, M. J. (2017) Breeding biology and the evolution of dynamic sexual dichromatism in frogs. J. Evol. Biol., 30: 2104-2115. doi:10.1111/jeb.13170