Mammal diversification trigged scorpions' toxins

The diversification of toxins active agains mammal tissues is a recent evolutionary event in scorpion history. Check the story here:

https://news.wisc.edu/scorpions-venomous-threat-to-mammals-a-relatively-new-evolutionary-ste/

and the original publication is here

Systematic Biology: Santibáñez-López et al. Phylogenomics of Scorpions Reveal Contemporaneous Diversification of Scorpion Mammalian Predators and Mammal-Active Sodium Channel Toxins.