Willowtree
Can we add Francis Crick's space aliens to this list ?
Directed panspermia is a remote possibility however there are huge difficulties and it is odd that an alien race would find it necessary to do such a resource intensive effort.While it is unlikely it stands on the borderlands as a possibility but a very low probability due to physical constraints on space travel over the distances involved.
Roswell,though, has been thoroughly debunked through all attempts to perform CPR on its dusty corpse.
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