What would happen if a venomous snake bit its tongue? Or if a scorpion stung itself? Lucky for venomous and poisonous animals, they seem to be immune to their own toxins.
Some venomous creatures avoid harming themselves because the toxin is in a special compartment in their bodies. For example, certain snakes have glands and ducts lined with cells resistant to the venom.
All of these immunities have one thing in common: Scientists suggest these capabilities are driven by mutations in their DNA, which might help explain why some members of a species are deadly, while others are practically harmless.