As I posted, I've seen about 2 trucks full of pallets heading southbound I-71 last week.
Those are regular pallets. We are talking about alien pallets. They sometimes disguise themselves as regular pallets. Kind of like politicians disguising themselves as people.
How do I tell from which is which? Do I ask them?
Sorry, but I think the migration theory is flawed. I believe pallets hibernate in place. I propose those seen in migration are actually being taken against their free will.
Pallet hibernation - Google results:
If that was true they would still be there, yes? Ahh but Dr. Watson, they are gone! Where? More thinking and discovery is needed...