An arms race between newts and snakes means biological warfare. 
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Main Paper References:
Gilbert AL, Cabrera S, Hague MTJ, Stokes AN, Feldman CR, Hanifin CT, Brodie ED, Brodie ED. 2023. Phenotypic outcomes of predator–prey coevolution are predicted by landscape variation in climate and community composition. Functional Ecology 37:2170–2180. DOI: 10.1111/1365-2435.14360.
Other Mentioned Papers/Studies:
Calhoun, D. M., Bucciarelli, G. M., Kats, L. B., Zimmer, R. K., & Johnson, P. T. (2017). Noxious newts and their natural enemies: Experimental effects of tetrodotoxin exposure on trematode parasites and aquatic macroinvertebrates. Toxicon, 137, 120-127.
Williams, B. L., Hanifin, C. T., Brodie, E. D., & Brodie III, E. D. (2010). Tetrodotoxin affects survival probability of rough-skinned newts (Taricha granulosa) faced with TTX-resistant garter snake predators (Thamnophis sirtalis). Chemoecology, 20, 285-290.
Editing and Music:
Podcast edited by Emmy – https://www.fiverr.com/emmyk10 
Intro/outro – Treehouse by Ed Nelson
Species Bi-week theme – Michael Timothy
Other Music – The Passion HiFi, https://www.thepassionhifi.com