eli5: Why do snakes have such potent venom when the prey they eat are normally small in comparison?

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I’m from northern Australia and we have many snakes that can easily kill humans, cattle and other live stock. The power of these snakes venom seems overkill for what is required?

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Anonymous 0 Comments

Evolution doesn’t know what’s going to happen in the future. It doesn’t know what the snake will evolve into, what its prey will be, or what will be needed to kill it. Venom simply evolves and if it’s not potent enough, then it provides no evolutionary benefit and there is no selective pressure, whereas any amount beyond what is needed is a success.

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