Comment Re:It'll never happen (Score 1) 333
...which is why they've never contacted us. Same reason very few people try to make contact with plankton blooms. There's another thought experiment that postulates we're being approached by aliens all the time (in geological time), but that we not only have no way to identify them as living or intelligent, but don't even have a way to measure that they exist. That likely goes the other way too -- another intelligent life that is hydrocarbon-based would most likely destroy us without even noticing we existed.