[Trivial Psychic]

What I haven't figured out, is that the Yautja have been hunting their favorite prey, the serpents, on the planet Earth as a right of passage since the dawn of mankind. They gave man language, advancements in architecture and mathematics, and were in turn worshipped by earlier civilizations as gods. The Yautja came to Earth, because they also needed man in order to create their favorite prey, and as repayment to the gods for the gifts they brought, man would willingly sacrifice themselves so the Yautja could continue the hunt.

Kind of hard to do that, when David created the damn things 2000+ years in the future.

This means that:

1. The Yutani Corporation never recovers the Yautja plasma caster from the Colorado incident that jump-starts human technology, thus stunting advancements in the harnessing of plasma energy.
   
   
2. The union that eventually comes when the tech giant (Yutani) and the space pioneer (Weyland) merge as Weyland-Yutani, most likely never happens, as without a cheap, efficient, and easy to reproduce energy source, space travel will never be profitable.
   
   
3. Since these two powerhouses of space and technology never come together, humans will no longer have the long range capability and technology to reach those depths of space to begin with. With that...No space truckers. No LV426. No Fiorina 161. No Jones the cat. None of it.
   
   
4. And this all occurs because the Yautja Youngbloods never had the damned things to hunt on Earth to begin with, because they hadn't been created yet by the Wagner loving, flute playing, synthetic from the future.

This is heavy Doc...