What difference does it make? They are travelers like any other! Just because they travel billions of miles through the darkness of vacuum doesn’t make them any different.
Taking the spirit of their surroundings to share it somewhere else with someone else…if they could be understood! Differences here and there are no differences at all if the senses are guided by the capabilities of cheerful feelings.
So they arrive; they fuse with the environment; they disappear.
Then the morphing stage is started once again, for another cycle, until the natural degradation of the process stops any further transformation, so rest returns for a moment in time, to mark the differentiation of every step in the evolutionary process.
What if travelers have been arriving all the time? Then there is no evolutionary process, but rather a morphing one, based on steps throughout time.
What if travelers are still arriving and will keep arriving in the future? Then the morphing process will continue in incremental steps in the times to come.
Maybe like the natural feeding that makes a body grow; or maybe like the external input required for any qualifying device designed to feed on and self-program accordingly.
Maybe like an evolutionary process as they wrongly call it.