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The original was posted on /r/horror by /u/AndreasDasos on 2025-07-25 11:13:00+00:00.

The aliens in Invasion of the Body Snatchers ‘start’ as amorphous spores travelling through space that form pods (and flowers?) on Earth when close enough to people they can target and replace. These pod people then wander around but can’t sexually reproduce and I don’t believe we see them create more spores. Eventually they lay waste to the host planet and died out, leaving it dead.

But then… how could this possibly evolve as part of their life cycle? What use is it for a species to use a huge amount of its resources on a dead end stage that doesn’t help produce new spores? If new spores come directly from the pods or flowers (is that the case?), why expend so much energy on creating pod people?

The pod people are seen transporting the pods but again… why? Their spores can easily travel through space without help, why can’t they travel the same way on a planet with wind to help the process?

The book talks about them ‘consuming resources’ but they seem to waste most of them on a very complex process that serves no evolutionary purpose