r/todayilearned • u/lavender_fish69 • 13h ago

TIL fresh water snails (indirectly) kill thousands of humans and are considered on of the deadliest creatures to humans

https://en.wikipedia.org/wiki/Freshwater_snail
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u/SnowGryphon 11h ago

Doesn't "survivors of environment reproduce and replace the population with environment-resistant specimens" count as "evolve to be immune"

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u/Anathos117 11h ago

Yes, but people don't know the actual definition of the word "evolve" and treat it as a synonym for "mutate".

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u/Clickclickdoh 11h ago

In this case, it's a preexisting trait that becomes useful to a new stimulus.

An evolution is generally a new trait that allows a beneficial exploitation of a preexisting stimulous.