Answer (1 of 4): In Children of Dune, Leto II states that the sandtrout (and thus the sandworms) were brought to Arrakis from elsewhere, and a previously wet world became a desert world [Sandworm]. From what we know of the Dune universe, there are three potential groups who could have introduced
What is the most interesting, powerful and influential character in Dune? - Quora
Are sandworms scientifically accurate?
How was Paul able to walk on sand without sinking in quicksand like everyone else in Dune? - Quora
What are some of the spiritual themes explored in Dune? - Quora
In the first photo shared from Frank Herbert's sci-fi classic DUNE series, we see Paul Atreides in his main planet, Caladan, also known as the ocean planet. What are your first impressions
Can a human eat the flesh of a sandworm in Dune? - Quora
Which universe is more realistic: Star Wars or Frank Herbert's 'Dune'? - Quora
Why does the Dune worm look like that? - Quora
Who introduced the sandworms to Arrakis in Dune? - Quora
What is the nose thing in Dune? - Quora
Can you provide a list of all of the Dune books ever written, including prequels and sequels? - Quora
What are some good Dune lore rabbit holes to plunge down? I'd love to understand more about the navigators and how someone can transform into a sand worm. - Quora
Why was the Dune/Arrakis important in Frank Herbert's Dune universe? - Quora
If you had a sandtrout from Dune, would you release it? - Quora
Why doesn't the Emperor control Arrakis himself in Dune? - Quora