Biology
The Evolution of Venom Resistance in Snake Predator-Prey Arms Races
Quick fact
Some populations of California ground squirrels can survive rattlesnake venom doses that would kill a human, directly pitting their molecular defenses against the evolving toxin mixtures of their snake predators.
Why this is interesting
Imagine a mouse that can shrug off the bite of a deadly viper. How could such a defense ever evolve?