Here’s what we know.

The Holtzman Effect was crucial for not only the shields but also for space travel in theDuneuniverse.

And thus maybe didnt demand any upgrade."

Dune Prophecy Poster

How Much Does Dune’s Universe Actually Change Across 10,000 Years?

Mark Strong from Dune Prophecy and Paul Atreides with a shield in Dune (2021)

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Paul Atreides in Dune

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The Sisterhood of the Bene Gesserit in Dune: Prophecy Season 1 Ep 1

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Dune: Prophecy

Dune