> ## Content Index
> Fetch the complete content index at: https://www.cascadepbs.org/llms.txt
> Use this file to discover other available public pages before exploring further.

# Sand Dunes Shouldn’t Exist (Here’s Why They Do)
- URL: https://www.cascadepbs.org/show/its-okay-be-smart/episode/sand-dunes-shouldnt-exist-heres-why-they-do-bkmh9e/
- Published: 2024-04-02T23:16:50.000Z
- Updated: 2025-08-20T09:55:49.000Z
- Description: We travel to Great Sand Dunes National Park to climb the largest sand dunes in America.
- Author: Cascade PBS Staff
- Tags: Be Smart, Season 9, Episode 13, #ZZZ_Episode_af3c238a-a998-4851-b179-e5886cb36030, #episode, #ZZZ_Show_dc38a6e9-266e-43c1-b647-45e7445fad27, #v1.16

How can sand, blown by the wind, form such intricate and beautiful patterns as ripples and dunes? The answer is a surprising secret of self-organization. In this video, we travel to Great Sand Dunes National Park in Colorado to climb the largest sand dunes in North America and bring you the science of how wind and sand combine to create ordered landforms out of chaos. The science must flow.