The ultraterrestrials are an alien race that, well, isnt really alien. In fact, they originate from Earth, just like us humans, but their civilization is so much older and more advanced than ours that they have no trouble hiding from us (hivelink)
The ET theory requires intelligent life to emerge in multiple locations in the universe. The Ultraterrestrial theory only suggests life emerges 1 time and then multiple paths. Both require amazing coordinated secrecy.
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