re: Would ET's risk navigating the Oort Cloud to visit Earth?

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They'd never make it. They'd die of radiation exposure when they went through the Van Allen belts.

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An alien species who has traversed light years of distance and avoided extinction long enough to perfect this technology.... taken out by solar radiation.

The last one could be heard screaming "Damn, we didn't think about that!" but then they also remembered, no one can hear them scream in space.