Look At The Stars — learning animation

The website uses an original Mars river-process schematic by PMI Solutions LLC.
The cross-section explains erosion, sediment transport and deposition. It is an
illustrated tour preview, not a native app screenshot, a mapped Martian feature,
or a quantitative model of erosion. Dimensions and time are schematic.
Website timeline: animations/mars-rivers.json
Authoring source: Assets/Design/Website/Tours/mars-rivers.py
Static source: Assets/Design/Website/Tours/mars-rivers.svg
Fallback: assets/tour-mars-rivers.webp
The animation loops only while the explanation is current and visible, pauses
offscreen or when the page is hidden, and holds complete frame 179 for reduced
motion. There is no player or popup. Phone label sizes adapt for readability.

Scientific references for Martian erosion, sediment transport and deposition:
https://science.nasa.gov/resource/mars-2020-target-jezero-crater/
https://science.nasa.gov/resource/now-and-long-ago-at-gale-crater-mars/

Lottie runtime
lottie-web 5.13.0, official light build, rendered as SVG without expressions.
Copyright (c) 2015 Bodymovin. Distributed under the MIT License.
Runtime: vendor/lottie-light-5.13.0.min.js
License: vendor/lottie-web-LICENSE.txt
Pinned upstream runtime:
https://raw.githubusercontent.com/airbnb/lottie-web/v5.13.0/build/player/lottie_light.min.js
Pinned upstream license:
https://raw.githubusercontent.com/airbnb/lottie-web/v5.13.0/LICENSE.md